Ford OBD 2 Info (codes)

[NVENEM8U]

Ford OBD-II Trouble Codes

Here is a breakdown of what each digit of the code means:
First Character - System

The first character identifies identifies the system related to the trouble code.

* P = Powertrain
* B = Body
* C = Chassis
* U = Undefined

Second Digit - Code Type

The second digit identifies whether the code is a generic code (same on all OBD-II equpped vehicles), or a manufacturer specific code.

* 0 = Generic (this is the digit zero -- not the letter "O")
* 1 = Enhanced (manufacturer specific)

Third Digit - Sub-System

The third digit denotes the type of sub-system that pertains to the code

* 1 = Emission Management (Fuel or Air)
* 2 = Injector Circuit (Fuel or Air)
* 3 = Ignition or Misfire
* 4 = Emission Control
* 5 = Vehicle Speed & Idle Control
* 6 = Computer & Output Circuit
* 7 = Transmission
* 8 = Transmission
* 9 = SAE Reserved
* 0 = SAE Reserved

Fourth and Fifth Digits

These digits, along with the others, are variable, and relate to a particular problem. For example,a P0171 code means P0171 - System Too Lean (Bank 1). To lookup your particular code, visit our OBD Trouble Codes section.

# P0100 MAF Circuit Malfunction
# P0101 MAF Circuit Range Problem
# P0102 - Mass Air Flow Circuit Low Input
# P0103 - Mass or Volume Air Flow Circuit High Input
# P0104 - Mass or Volume Air Flow Circuit Intermittent
# P0123 - Throttle Position Sensor A Circuit High Input
# P0132 - Oxygen O2 Sensor Circuit High Voltage (Bank 1, Sensor 1)e
# P0133 - Oxygen O2 Sensor Slow Response (Bank 1, Sensor 1)
# P0139 - Oxygen O2 Sensor Circuit Slow Response (Bank 1, Sensor 2)
# P0153 - Oxygen O2 Sensor Circuit Slow Response (Bank 2, Sensor 1)
# P0159 - Oxygen O2 Sensor Circuit Slow Response (Bank 2, Sensor 2)
# P0300 - Random/Multiple Cylinder Misfire Detected
# P0301 - Cylinder #1 Misfire Detected
# P0302 - Cylinder #2 Misfire Detected
# P0303 - Cylinder #3 Misfire Detected
# P0304 - Cylinder #4 Misfire Detected
# P0305 - Cylinder #5 Misfire Detected
# P0306 - Cylinder #6 Misfire Detected
# P0307 - Cylinder #7 Misfire Detected
# P0308 - Cylinder #8 Misfire Detected
# P0309 - Cylinder #9 Misfire Detected
# P0310 - Cylinder #10 Misfire Detected
# P0311 - Cylinder #11 Misfire Detected
# P0312 - Cylinder #12 Misfire Detected
# P0420 - Catalyst Efficiency Below Threshold
# P0431 - Warm Up Catalyst Below Threshold
# P0440 Evaporative Emission Control System Malfunction
# P0500 - Variable Speed Sensor Malfunction
# OBD-II Bxxxx Body Codes
# OBD-II Cxxxx Chassis Codes
# OBD-II Uxxxx Network Codes
P1001 KOER Test Cannot Be Completed
P1039 Vehicle Speed Signal Missing or Improper
P1051 Brake Switch Signal Missing or Improper
P1100 Mass Air Flow Sensor Intermittent
P1101 Mass Air Flow Sensor out of Self-Test Range
P1112 Intake Air Temperature Sensor Intermittent
P1116 Engine Coolant Temperature Sensor is out of Self-Test Range
P1117 Engine Coolant Temperature Sensor Intermittent
P1120 Throttle Position Sensor out of range
P1121 Throttle Position Sensor Inconsistent with Mass Air Flow Sensor
P1124 Throttle Position Sensor out of Self-Test Range
P1125 Throttle Position Sensor Intermittent
P1127 Heated Oxygen Sensor Heater not on During KOER Test
P1128 Heated Oxygen Sensor Signals reversed
P1129 Heated Oxygen Sensor Signals reversed
P1130 Lack of Upstream Heated Oxygen Sensor Switch - Adaptive Fuel Limit - Bank No. 1
P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1
P1132 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Rich - Bank No. 1
P1135 Ignition Switch Signal Missing or Improper
P1137 Lack of Downstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1
P1138 Lack of Downstream Heated Oxygen Sensor Switch - Sensor Indicates Rich - Bank No. 1
P1150 Lack of Upstream Heated Oxygen Sensor Switch - Adaptive Fuel Limit - Bank No. 2
P1151 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 2
P1152 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Rich - Bank No. 2
P1157 Lack of Downstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 2
P1158 Lack of Downstream Heated Oxygen Sensor Switch - Sensor Indicates Rich - Bank No. 2
P1220 Series Throttle Control fault
P1224 Throttle Position Sensor B out of Self-Test Range
P1230 Open Power to Fuel Pump circuit
P1231 High Speed Fuel Pump Relay activated
P1232 Low Speed Fuel Pump Primary circuit failure
P1233 Fuel Pump Driver Module off-line
P1234 Fuel Pump Driver Module off-line
P1235 Fuel Pump Control out of range
P1236 Fuel Pump Control out of range
P1237 Fuel Pump Secondary circuit fault
P1238 Fuel Pump Secondary circuit fault
P1250 Lack of Power to FPRC Solenoid
P1260 Theft Detected - Engine Disabled
P1270 Engine RPM or Vehicle Speed Limiter Reached
P1288 Cylinder Head Temperature Sensor out of Self-Test Range
P1289 Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range
P1290 Cylinder Head Temperature Sensor Signal Less Than Self-Test Range
P1299 Cylinder Head Temperature Sensor Detected Engine Overheating Condition
P1309 Misfire Detection Monitor not enabled
P1351 Ignition Diagnostic Monitor circuit Input fault
P1352 Ignition Coil A - Primary circuit fault
P1353 Ignition Coil B - Primary circuit fault
P1354 Ignition Coil C - Primary circuit fault
P1355 Ignition Coil D - Primary circuit fault
P1356 Loss of Ignition Diagnostic Module Input to PCM
P1358 Ignition Diagnostic Monitor Signal out of Self-Test Range
P1359 Spark Output circuit fault
P1364 Ignition Coil Primary circuit fault
P1380 VCT Solenoid Valve circuit Short or Open
P1381 Cam Timing Advance is excessive
P1383 Cam Timing Advance is excessive
P1390 Octane Adjust out of Self-Test Range
P1400 Differential Pressure Feedback Electronic Sensor circuit Low Voltage
P1401 Differential Pressure Feedback Electronic Sensor circuit High Voltage
P1403 Differential Pressure Feedback Electronic Sensor Hoses Reversed
P1405 Differential Pressure Feedback Electronic Sensor circuit Upstream Hose
P1406 Differential Pressure Feedback Electronic Sensor circuit Downstream Hose
P1407 EGR No Flow Detected
P1408 EGR Flow out of Self-Test Range
P1409? EGR Vacuum Regulator circuit malfunction
P1409? Electronic Vacuum Regulator Control circuit fault
P1410 EGR Barometric Pressure Sensor VREF Voltage
P1411 Secondary Air is not being diverted
P1413 Secondary Air Injection System Monitor circuit Low Voltage
P1414 Secondary Air Injection System Monitor circuit High Voltage
P1442 Secondary Air Injection System Monitor circuit High Voltage
P1443 Evaporative Emission Control System - Vacuum System - Purge Control Solenoid or Purge Control Valve fault
P1444 Purge Flow Sensor circuit Input Low
P1445 Purge Flow Sensor circuit Input High
P1450 Inability of Evaporative Emission Control System to Bleed Fuel Tank
P1451 EVAP Control System Canister Vent Solenoid Circuit Malfunction
P1452 Inability of Evaporative Emission Control System to Bleed Fuel Tank
P1455 Substantial Leak or Blockage in Evaporative Emission Control System
P1460 Wide Open Throttle Air Conditioning Cutoff circuit malfunction
P1461 Air Conditioning Pressure Sensor circuit Low Input
P1462 Air Conditioning Pressure Sensor circuit high Input
P1463 Air Conditioning Pressure Sensor Insufficient Pressure change
P1464 ACCS to PCM High During Self-Test
P1469 Low Air Conditioning Cycling Period
P1473 Fan Secondary High with Fans Off
P1474 Low Fan Control Primary circuit
P1479 High Fan Control Primary circuit
P1480 Fan Secondary Low with Low Fans On
P1481 Fan Secondary Low with High Fans On
P1483 Power to Cooling Fan Exceeded Normal Draw
P1484 Variable Load Control Module Pin 1 Open
P1500 Vehicle Speed Sensor Intermittent
P1501 Programmable Speedometer & Odometer Module/Vehicle Speed Sensor Intermittent circuit-failure
P1502 Invalid or Missing Vehicle Speed Message or Brake Data
P1504 Intake Air Control circuit malfunction
P1505 Idle Air Control System at Adaptive Clip
P1506 Idle Air Control Over Speed Error
P1507 Idle Air Control Under Speed Error
P1512 Intake Manifold Runner Control Stuck Closed
P1513 Intake Manifold Runner Control Stuck Closed
P1516 Intake Manifold Runner Control Input Error
P1517 Intake Manifold Runner Control Input Error
P1518 Intake Manifold Runner Control fault - Stuck Open
P1519? Intake Manifold Runner Control Stuck Open
P1520? Intake Manifold Runner Control circuit fault
P1519? Intake Manifold Runner Control fault - Stuck Closed
P1520? Intake Manifold Runner Control fault
P1530 Open or Short to A/C Compressor Clutch circuit
P1537 Intake Manifold Runner Control Stuck Open
P1538 Intake Manifold Runner Control Stuck Open
P1539 Power to A/C Compressor Clutch circuit Exceeded Normal Current Draw
P1549 Intake Manifold Temperature Valve Vacuum Actuator Connection
P1550 Power Steering Pressure Sensor out of Self-Test Range
P1605 PCM Keep Alive Memory Test Error
P1625 Voltage to Vehicle Load Control Module Fan circuit not detected
P1626 Voltage to Vehicle Load Control Module circuit not detected
P1650 Power Steering Pressure Switch out of Self-Test Range
P1651 Power Steering Pressure Switch Input fault
P1700 Transmission system problems
P1701 Reverse Engagement Error
P1702 Transmission system problems
P1703 Brake On/Off Switch out of Self-Test Range
P1704 Transmission system problems
P1705 Manual Lever Position Sensor out of Self-Test Range
P1709 Park or Neutral Position Switch out of Self-Test Range
P1710 Transmission system problems
P1711 Transmission Fluid Temperature Sensor out of Self-Test Range
P1713
thru
P172 Transmission system problems
P1729 4x4 Low Switch Error
P1740 Transmission system problems
P1741 Torque Converter Clutch Control Error
P1742 Torque Converter Clutch Solenoid Faulty
P1743 Torque Converter Clutch Solenoid Faulty
P1744 Torque Converter Clutch System Stuck in Off Position
P1745 Transmission system problems
P1746 Electronic Pressure Control Solenoid - Open circuit
P1747 Electronic Pressure Control Solenoid - Short circuit
P1749 Electronic Pressure Control Solenoid Failed Low
P1751 Shift Solenoid No. 1 Performance
P1754 Coast Clutch Solenoid circuit malfunction
P1756 Shift Solenoid No. 2 Performance
P1760 Transmission system problems
P1761 Shift Solenoid No. 3 Performance
P1762 Transmission system problems
P1767 Transmission system problems
P1780 Transmission Control Switch circuit is out of Self-Test Range
P1781 4x4 Low Switch is out of Self-Test Range
P1783 Transmission Over-Temperature Condition
P1784 Transmission system problems
P1785 Transmission system problems
P1786 Transmission system problems
P1787 Transmission system problems
P1788 Transmission system problems
P1789 Transmission system problems
P1900 Transmission system problems

 

[NVENEM8U]

up date!!!

Ford OBD-II Powertrain Diagnostic Trouble Codes (P1000-P1900)
Source: 2000 Ford Workshop Information Manual

DTC Description Possible Causes Diagnostic Aides
____________________________________________________________________________________________________

: P1000 - Monitor : The on board : * Vehicle is new from : The DTC does not need :
: Testing Not Complete : diagnostic II (OBD II) : the factory : to be cleared from the :
: : monitors are performed : * Battery or PCM had : PCM except to pass an :
: : during the OBD II : recently been : inspection/maintenance :
: : Drive Cycle. The DTC : disconnected : test. :
: : will be stored in : * An OBD II monitor :
: : continuous memory if : failure had :
: : any of the OBD II : occurred before :
: : monitors do not : completion of an :
: : complete. : OBD II drive cycle :
: : : * PCM DTCs have :
: : : recently been :
: : : cleared with a scan :
: : : tool :
: : : * PTO circuit is :
: : : shorted to VPWR or :
: : : B+ or PTO is on :
: : : during testing :
____________________________________________________________________________________________________

: P1001 - KOER Not Able : This Non-MIL : * Incorrect Self-Test : Rerun Self-Test :
: To Complete, KOER : (Malfunction Indicator : Procedure. : following QT1 in :
: Aborted : Lamp) code will be set : * Unexpected response : Section 3, Symptom :
: : when Key On Engine : from Self-Test : Charts, STEP 1: PCM :
: : Running (KOER) Self : monitors. : Quick Test. :
: : -Test does not : * rpm out of :
: : complete in the time : specification. :
: : intended. :
____________________________________________________________________________________________________

: P1100 - Mass Air Flow : The MAF sensor circuit : * Poor continuity : While accessing the :
: (MAF) Sensor : is monitored by the : through the MAF : MAF V PID on the scan :
: Intermittent : PCM for sudden voltage : sensor connectors : tool, lightly tap on :
: : (or air flow) input : * Poor continuity : the MAF sensor or :
: : change through the : through the MAF : wiggle the MAF sensor :
: : comprehensive : sensor harness : connector and harness. :
: : component monitor : * Intermittent open : If the MAF V PID :
: : (CCM). If during the : or short inside the : suddenly changes below :
: : last 40 warm-up cycles : MAF sensor. : 0.23 volt or above :
: : in key ON engine : : 4.60 volts, an :
: : running the PCM : : intermittent fault is :
: : detects a voltage (or : : indicated. :
: : air flow) change :
: : beyond the minimum or :
: : maximum calibrated :
: : limit, a continuous :
: : memory diagnostic :
: : trouble code (DTC) is :
: : stored. :
____________________________________________________________________________________________________

: P1101 - Mass Air Flow : The MAF sensor circuit : * Low battery charge : A MAF V PID reading :
: (MAF) Sensor Out of : is monitored by the : * MAF sensor : greater than 0.27 :
: Self-Test Range : PCM for an out of : partially connected : volts (KOEO) or a MAF :
: : range air flow (or : * MAF sensor : V PID reading outside :
: : voltage) input. If : contamination : the 0.46 volt to 2.44 :
: : during key ON engine : * PWR GND open to MAF : volts range (KOER) :
: : OFF the air flow (or : sensor : indicates a hard :
: : voltage) reading is : * MAF RTN circuit : fault. :
: : greater than (grams : open to PCM :
: : /second equivalent : * Damaged MAF sensor :
: : chart in pinpoint test : * Damaged PCM :
: : DC [0.27 volt]), the :
: : test fails. Likewise, :
: : if during key ON :
: : engine running an air :
: : flow (or voltage) :
: : reading is not within :
: : (gram/second :
: : equivalent chart in :
: : pinpoint test DC [0.46 :
: : volt to 2.44 volts]), :
: : the test fails. :
____________________________________________________________________________________________________

: P1109 - Intake Air : Indicates IAT2 circuit : * Damaged harness : Monitor IAT2 on scan :
: Temperature 2 Sensor : became intermittently : * Damaged sensor : tool, look for sudden :
: Intermittent : open or shorted while : * Damaged harness : changes in reading :
: : engine was running. : connector : when harness is :
: : : * Damaged PCM : wiggled or sensor is :
: : : : tapped. :
____________________________________________________________________________________________________

: P1112 - Intake Air : Indicates IAT sensor : * Damaged harness : Monitor IAT on scan :
: Temperature (IAT) : signal was : * Damaged sensor : tool, look for sudden :
: Sensor Intermittent : intermittent during : * Damaged harness : changes in reading :
: : the comprehensive : connector : when harness is :
: : component monitor. : * Damaged PCM : wiggled or sensor is :
: : : : tapped. :
____________________________________________________________________________________________________

: P1114 - Intake Air : Indicates the sensor : * Grounded circuit in : Monitor IAT2 PID. :
: Temperature 2 Circuit : signal is less than : harness : Typical IAT2 :
: Low Input : Self-Test minimum. The : * Improper harness : temperature should be :
: : IAT2 sensor minimum is : connection : greater than IAT1. :
: : 0.2 volts. : * Damaged sensor : Refer to Section 6: :
: : : * Damaged PCM : Reference Values for :
: : : : ranges. :
____________________________________________________________________________________________________

: P1115 - Intake Air : Indicates the sensor : * Open circuit in : Monitor IAT2 PID. :
: Temperature 2 Circuit : signal is greater than : harness : Typical IAT2 :
: High Input : Self-Test maximum. The : * Sensor signal short : temperature should be :
: : IAT2 sensor maximum is : to power : greater than IAT1. :
: : 4.6 volts. : * Improper harness : Refer to Section 6: :
: : : connection : Reference Values for :
: : : * Damaged sensor : ranges. :
: : : * Damaged PCM :
____________________________________________________________________________________________________

: P1116 - Engine Coolant : Indicates the ECT : * Overheating : Engine coolant :
: Temperature (ECT) : sensor is out of Self : condition : temperature must be :
: Sensor Out of Self : -Test range. Correct : * Malfunctioning : greater than 10øC :
: -Test Range : range is 0.3 to 3.7 : thermostat : (50øF) to pass the :
: : volts. : * Damaged ECT sensor : KOEO Self-Test and :
: : : * Low engine coolant : greater than 82øC :
: : : * Damaged harness : (180øF) to pass the :
: : : connector : KOER Self-Test. :
: : : * Damaged PCM :
____________________________________________________________________________________________________

: P1117 - Engine Coolant : Indicates ECT circuit : * Damaged harness : - Monitor ECT on scan :
: Temperature (ECT) : became intermittently : * Damaged sensor : tool, look for :
: Sensor Intermittent : open or shorted while : * Damaged PCM : sudden changes in :
: : engine was running. : * Damaged harness : reading when :
: : : connector : harness is wiggled :
: : : * Low engine coolant : or sensor is :
: : : : tapped. :
____________________________________________________________________________________________________

: P1120 - Throttle : The TP sensor circuit : * TP circuit with : A TP PID (TP V PID) :
: Position (TP) Sensor : is monitored by the : frayed wires : between 3.42 and 9.85% :
: Out of Range Low : PCM for a low TP : * Corrosion on TP : (0.17 and 0.49 volt) :
: (RATCH too Low) : rotation angle (or : circuit connectors : in key ON engine OFF, :
: : voltage) input below : * VREF open to TP : continuous memory or :
: : the closed throttle : sensor : key ON engine running :
: : position through the : * VREF short to SIG : indicates a hard :
: : comprehensive : RTN : fault. :
: : component monitor : * TP sensor loose :
: : (CCM). If during key : pins :
: : ON engine OFF or key :
: : ON engine running the :
: : TP rotation angle (or :
: : voltage) remains :
: : within the calibrated :
: : self-test range but :
: : falls between 3.42 and :
: : 9.85% (0.17 and 0.49 :
: : volt), the test fails. :
____________________________________________________________________________________________________

: P1121 - Throttle : The PCM monitors a : * Air leak between : Drive vehicle and :
: Position (TP) Sensor : vehicle operation : MAF sensor and : exercise throttle and :
: Inconsistent with MAF : rationality check by : throttle body : TP sensor in all :
: Sensor : comparing sensed : * TP sensor not : gears. A TP PID (TP V :
: : throttle position to : seated properly : PID) less than 4.82 % :
: : mass air flow : * Damaged TP sensor : (0.24 volt) with a :
: : readings. If during : * Damaged MAF sensor : LOAD PID greater than :
: : key ON engine running : : 55% or a TP V PID :
: : self-test the : : greater than 49.05% :
: : comparison of the TP : : (2.44 volts) with a :
: : sensor and MAF sensor : : LOAD PID less than 30% :
: : readings are not : : indicates a hard :
: : consistent with : : fault. :
: : calibrated load values :
: : , the test fails and a :
: : diagnostic trouble :
: : code is stored in :
: : continuous memory. :
____________________________________________________________________________________________________

: P1124 - Throttle : The TP sensor circuit : * Binding or bent : A TP PID (TP V PID) :
: Position (TP) Sensor : is monitored by the : throttle linkage : reading not between :
: Out of Self-Test Range : PCM for an out of : * TP sensor not : 13.27 and 23.52% (0.66 :
: : range TP rotation : seated properly : and 1.17 volts) in key :
: : angle (or voltage) : * Throttle plate : ON engine OFF or key :
: : input. If during key : below closed : ON engine running :
: : ON engine OFF or key : throttle position : indicates a hard :
: : ON engine running the : * Throttle plate : fault. :
: : TP rotation angle (or : /screw misadjusted :
: : voltage) reading is : * Damaged TP sensor :
: : less than 13.27% (0.66 : * Damaged PCM :
: : volt) or greater than :
: : 23.52% (1.17 volts), :
: : the test fails. :
____________________________________________________________________________________________________

: P1125 - Throttle : The TP sensor circuit : * Poor continuity : While accessing the TP :
: Position (TP) Sensor : is monitored by the : through the TP : V PID on the scan tool :
: Intermittent : PCM for sudden TP : sensor connectors : , lightly tap on the :
: : rotation angle (or : * Poor continuity : TP sensor or wiggle :
: : voltage) input change : through the TP : the TP sensor :
: : through the : harness : connector and harness. :
: : comprehensive : * Intermittent open : If the TP V PID :
: : component monitor : or short inside the : suddenly changes below :
: : (CCM). If during the : TP sensor : 0.49 volt or above :
: : last 80 warm-up cycles : : 4.65 volts, an :
: : in key ON engine : : intermittent fault is :
: : running the PCM : : indicated. :
: : detects a TP rotation :
: : angle (or voltage) :
: : changes beyond the :
: : minimum or maximum :
: : calibrated limit, a :
: : continuous diagnostic :
: : trouble code (DTC) is :
: : stored. :
____________________________________________________________________________________________________

: P1127 - Exhaust Not : The HEGO monitor uses : * Engine not : Monitor HO2S Heater :
: Warm Enough, : an exhaust temperature : operating long : PIDs to determine :
: Downstream Sensor Not : model to determine : enough prior to : their ON/OFF state. :
: Tested : when the HO2S heaters : performing KOER : DTC P1127 will be :
: : are cycled ON. The : self-test. : present if the exhaust :
: : test fails when the : * Exhaust system too : is not hot. :
: : inferred exhaust : cool. :
: : temperature is below a :
: : minimum calibrated :
: : value. :
____________________________________________________________________________________________________

: P1128 - Upstream : The HEGO monitor : * Crossed HO2S :
: Oxygen Sensors Swapped : checks and determines : harness connectors :
: from Bank to Bank : if the HO2S signal : (upstream). :
: (HO2S-11-21) : response for a fuel : * Crossed HO2S wiring :
: : shift corresponds to : at the harness :
: : the correct engine : connectors :
: : bank. The test fails : (upstream). :
: : when a response from : * Crossed HO2S wiring :
: : the HO2S(s) being : at the 104-pin :
: : tested is not : harness connectors :
: : indicated. : (upstream). :
____________________________________________________________________________________________________

: P1129 - Downstream : The HEGO monitor : * Crossed HO2S :
: Oxygen Sensors Swapped : checks and determines : harness connectors :
: from Bank to Bank : if the HO2S signal : (downstream). :
: (HO2S-12-22) : response for a fuel : * Crossed HO2S wiring :
: : shift corresponds to : at the harness :
: : the correct engine : connectors :
: : bank. The test fails : (downstream). :
: : when a response from : * Crossed HO2S wiring :
: : the HO2S(s) being : at the 104-pin :
: : tested is not : harness connectors :
: : indicated. : (downstream). :
____________________________________________________________________________________________________

: P1130 - Lack of HO2S : The HEGO Sensor is : Electrical: : A fuel control HO2S :
: -11 Switch, Fuel Trim : monitored for : * Short to VPWR in : PID switching across :
: at Limit : switching. The test : harness or HO2S : 0.45 volt from 0.2 to :
: : fails when the HO2S : * Water in harness : 0.9 volt indicates a :
: : fails to switch due to : connector : normal switching HO2S. :
: : circuit or fuel at or : * Open/Shorted HO2S :
: : exceeding a calibrated : circuit :
: : limit. : * Corrosion or poor :
: : : mating terminals :
: : : and wiring :
: : : * Damaged HO2S :
: : : * Damaged PCM :
: : : Fuel System: :
: : : * Excessive fuel :
: : : pressure :
: : : * Leaking :
: : : /contaminated :
: : : fuel injectors :
: : : * Leaking fuel :
: : : pressure :
: : : regulator :
: : : * Low fuel pressure :
: : : or running out of :
: : : fuel :
: : : * Vapor recovery :
: : : system :
: : : Induction System: :
: : : * Air leaks after :
: : : the MAF :
: : : * Vacuum Leaks :
: : : * PCV system :
: : : * Improperly seated :
: : : engine oil :
: : : dipstick :
: : : EGR System: :
: : : * Leaking gasket :
: : : * Stuck EGR valve :
: : : * Leaking diaphragm :
: : : or EVR :
: : : Base Engine: :
: : : * Oil overfill :
: : : * Cam timing :
: : : * Cylinder :
: : : compression :
: : : * Exhaust leaks :
: : : before or near :
: : : the HO2S(s) :
____________________________________________________________________________________________________


: P1131 - Lack of HO2S : A HEGO sensor : See Possible Causes :
: -11 Switch, Sensor : indicating lean at the : for DTC P1130 :
: Indicates Lean : end of a test is :
: : trying to correct for :
: : an over-rich :
: : condition. The test :
: : fails when the fuel :
: : control system no :
: : longer detects :
: : switching for a :
: : calibrated amount of :
: : time. :
____________________________________________________________________________________________________

: P1132 - Lack of HO2S : A HEGO sensor : See Possible Causes :
: -11 Switch, Sensor : indicating rich at the : for DTC P1130 :
: Indicates Rich : end of a test is :
: : trying to correct for :
: : an over-lean :
: : condition. The test :
: : fails when the fuel :
: : control system no :
: : longer detects :
: : switching for a :
: : calibrated amount of :
: : time. :
____________________________________________________________________________________________________

: P1137 - Lack of HO2S : The downstream HO2S : * Pinched, shorted, :
: -12 Switch, Sensor : sensors are forced : and corroded wiring :
: Indicates Lean : rich and lean and : and pins :
: : monitored by the PCM. : * Crossed sensor :
: : The test fails if the : wires :
: : PCM does not detect : * Exhaust leaks :
: : the output of the HO2S : * Contaminated or :
: : in a calibrated amount : damaged sensor :
: : of time. :
____________________________________________________________________________________________________

: P1138 - Lack of HO2S : See DTC P1137 :
: -12 Switch, Sensor :
: Indicates Rich :
____________________________________________________________________________________________________

: P1150 - Lack of HO2S : See DTC P1130 :
: -21 Switch, Fuel Trim :
: at Limit :
____________________________________________________________________________________________________

: P1151 - Lack of HO2S : A HEGO sensor : See Possible Causes :
: -21 Switch, Sensor : indicating lean at the : for DTC P1130 :
: Indicates Lean : end of a test is :
: : trying to correct for :
: : an over-rich :
: : condition. The test :
: : fails when fuel :
: : control system no :
: : longer detects :
: : switching for a :
: : calibrated amount of :
: : time. :
____________________________________________________________________________________________________

: P1152 - Lack of HO2S : A HEGO sensor : See Possible Causes :
: -21 Switch, Sensor : indicating rich at the : for DTC P1130 :
: Indicates Rich : end of a test is :
: : trying to correct for :
: : an over-lean :
: : condition. The test :
: : fails when the fuel :
: : control system no :
: : longer detects :
: : switching for a :
: : calibrated amount of :
: : time. :
____________________________________________________________________________________________________

: P1157 - Lack of HO2S : See DTC P1137 :
: -22 Switch, Sensor :
: Indicates Lean :
____________________________________________________________________________________________________

: P1158 - Lack of HO2S : See DTC P1137 :
: -22 Switch, Sensor :
: Indicates Rich :
____________________________________________________________________________________________________

: P1168 - Fuel Rail : The comprehensive : * Low fuel pressure : A FRP PID value :
: Pressure Sensor in : component monitor : * Damaged FRP sensor : below 551 kpa (80 :
: Range But Low : (CCM) monitors the FRP : * Excessive : psi) indicates a :
: : pressure for : resistance in : failure :
: : acceptable fuel : circuit : * Low or no fuel :
: : pressure. The test : * Low or no fuel : A FRP PID value :
: : fails when the fuel : : greater than 896 :
: : pressure falls below a : : kpa (130 psi) :
: : calibrated value. : : indicates a failure :
____________________________________________________________________________________________________

: P1169 - Fuel Rail : The comprehensive : * High fuel pressure :
: Pressure (FRP) Sensor : component monitor : * Low fuel pressure :
: in Range But High : (CCM) monitors the FRP : * Damaged FRP sensor :
: : pressure for : * Excessive :
: : acceptable fuel : resistance in :
: : pressure. The test : circuit :
: : fails when the fuel :
: : pressure falls below :
: : or exceeds a minimum :
: : /maximum calibrated :
: : value for a calibrated :
: : period of time. :
____________________________________________________________________________________________________

: P1180 - Fuel Delivery : The PCM receives fuel : * Restriction in the :
: System - Low : tank pressure (FTP) : fuel line :
: : information from the : * Plugged fuel filter :
: : natural gas module :
: : (NG), which uses the :
: : information to infer :
: : fuel rail pressure :
: : (FRP). The test fails :
: : when the inferred :
: : pressure is less than :
: : a minimum calibrated :
: : value. :
____________________________________________________________________________________________________

: P1181 - Fuel Delivery : The PCM receives fuel : * Fuel pressure :
: System - High : tank pressure (FTP) : regulator :
: : information from the :
: : natural gas module :
: : (NG), which uses the :
: : information to infer :
: : fuel rail pressure :
: : (FRP). The test fails :
: : when the inferred :
: : pressure is higher :
: : than a maximum :
: : calibrated value. :
____________________________________________________________________________________________________

: P1183 - Engine Oil : Indicates EOT circuit : * Damaged harness : Using signal :
: Temperature (EOT) : became intermittently : * Damaged sensor : simulation, disconnect :
: Sensor Circuit : open or shorted while : * Damaged harness : sensor and simulate :
: Malfunction : engine was running. : connector : 1.0V on sensor signal :
: : : * Damaged PCM : circuit. Simulated :
: : : : 1.0V signal and scan :
: : : : PID voltage value :
: : : : should be similar. If :
: : : : voltage is similar :
: : : : check sensor, if :
: : : : voltage is not similar :
: : : : check related circuit :
: : : : and PCM. :
____________________________________________________________________________________________________

: P1184 - Engine Oil : Indicates EOT signal : * Damaged harness : Using signal :
: Temperature (EOT) : was out of Self-Test : * Damaged sensor : simulation, disconnect :
: Sensor Out of Self : range. Correct range : * Damaged harness : sensor and simulate :
: -Test Range : for KOER is.3-1.2 : connector : 1.0V on sensor signal :
: : volts. : * Damaged PCM : circuit. Simulated :
: : : : 1.0V signal and scan :
: : : : PID voltage value :
: : : : should be similar. If :
: : : : voltage is similar :
: : : : check sensor, if :
: : : : voltage is not similar :
: : : : check related circuit :
: : : : and PCM. :
____________________________________________________________________________________________________

: P1229 - Supercharger : The ICP DTC will be : * Pump motor open : Check for voltage at :
: Intercooler Pump (ICP) : set when the PCM is : circuited : relay, check fuse in :
: Pump Not Operating : calling for the pump : * Pump relay coil : power feed, check :
: : to be operating but no : open : ground connection of :
: : current is being : * Open circuit : pump motor, PID :
: : detected. : between relay and : reading is on/off. :
: : : pump :
: : : * Damaged PCM :
: : : * Pump motor shorted :
: : : * Open circuit :
: : : between PCM and :
: : : relay :
: : : * Poor pump ground :
: : : connection :
____________________________________________________________________________________________________

: P1232 - Low Speed Fuel : Monitors the low speed : * Open or shorted low : - An open circuit or :
: Pump Primary Circuit : fuel pump (LFP) : fuel pump (LFP) : short to ground can :
: Malfunction : primary circuit output : circuit : only be detected :
: : from the PCM. The test : * Open VPWR to low : with the low speed :
: : fails if: When the LFP : speed fuel pump : fuel pump. :
: : circuit is commanded : relay : - A short to power :
: : on (grounded), : * Damaged low speed : can only be :
: : excessive current draw : fuel pump relay : detected with the :
: : is detected on the LFP : * Damaged PCM : low speed fuel pump :
: : circuit; or when the : : commanded on. :
: : LFP circuit is : : - During KOEO and :
: : commanded off, voltage : : KOER Self-Test, the :
: : is not detected on the : : low speed fuel pump :
: : LFP circuit (the PCM : : output command will :
: : expects to detect VPWR : : be cycled on and :
: : voltage coming through : : off. :
: : the low speed fuel :
: : pump relay coil to the :
: : LFP circuit). :
____________________________________________________________________________________________________

: P1233 - Fuel System : Note: For LS6/LS8, : * Inertia fuel : The PCM expects to see :
: Disabled or Offline : P1233 indicates the : shutoff (IFS) : one of the following :
: : PCM is not receiving : switch needs to be : duty cycle signals :
: : the fuel level : reset : from the FPDM on the :
: : information on SCP : * Open FPDM ground : FPM circuit: 1) 50% :
: : from the rear : circuit : (500 msec on, 500 msec :
: : electronics module : * Open or shorted FPM : off), all OK. 2) 25% :
: : (REM). Refer to the : circuit : (250 msec on, 750 msec :
: : Workshop Manual : * Damaged IFS switch : off), FPDM did not :
: : Section 413-01 for : * Damaged FPDM : receive a fuel pump :
: : diagnostics. Monitors : * Damaged PCM : (FP) duty cycle :
: : the fuel pump monitor : - Also for Escort : command from the PCM, :
: : (FPM) circuit from the : /Tracer and : or the duty cycle that :
: : fuel pump driver : Mustang: : was received was :
: : module (FPDM). With : - Open FPDM PWR : invalid. 3) 75% (750 :
: : the key on, the FPDM : circuit : msec ON, 250 OFF), the :
: : continuously sends a : - Open B+ circuit : FPDM has detected a :
: : duty cycle signal to : to constant : fault in the circuits :
: : the PCM through the : control relay : between the FPDM and :
: : FPM circuit. The test : module (CCRM) pin : the fuel pump. :
: : fails if the PCM stops : 11 :
: : receiving the duty : - Open ground to :
: : cycle signal. : CCRM pin 18 :
: : : (Mustang) :
: : : - Damaged CCRM :
: : : - Also for :
: : : Continental: :
: : : - Open VPWR circuit :
: : : to FPDM :
____________________________________________________________________________________________________

: P1234 - Fuel System : See DTC P1233. P1234 :
: Disabled or Offline : is identical to P1233 :
: : except P1234 will not :
: : illuminate the MIL. :
____________________________________________________________________________________________________

: P1235 - Fuel Pump : Note: For LS6/LS8, the : * FP circuit open or : The FPDM sends a 25% :
: Control Out Of Range : FPDM functions are : shorted : duty cycle (250 msec :
: : incorporated in the : * Damaged FPDM. : ON, 750 msec OFF) :
: : Rear Electronics : * Damaged PCM : through the FPM :
: : Module (REM). Also, : : circuit to the PCM :
: : the REM does not use a : : while the fault is :
: : FPM circuit. : : being detected by the :
: : Diagnostic information : : FPDM. If the fault is :
: : will be sent through : : no longer detected, :
: : SCP. Indicates that : : the PDM will return to :
: : the FPDM has detected : : sending an "all OK" :
: : an invalid or missing : : (50% duty cycle) :
: : FP circuit signal from : : message to the PCM. :
: : the PCM. The FPDM will : : The PCM will keep :
: : send a message to the : : P1235 stored in :
: : PCM through the FPM : : Continuous Memory. :
: : circuit, indicating :
: : that this failure has :
: : been detected. The PCM :
: : will set the DTC when :
: : the message is :
: : received. :
____________________________________________________________________________________________________

: P1236 - Fuel Pump : See DTC P1235. P1236 :
: Control Out Of Range : is identical to P1235 :
: : except P1236 will not :
: : illuminate the MIL. :
____________________________________________________________________________________________________

: P1237 - Fuel Pump : Note: For LS6/LS8, the : * Open or shorted FP : - The FPDM sends a :
: Secondary Circuit : FPDM functions are : PWR circuit : 75% duty cycle (750 :
: Malfunction : incorporated in the : * Open FP Rtn circuit : msec ON, 250 msec :
: : rear electronics : to FPDM : OFF) through the :
: : module (REM). Also, : * Open or shorted : FPM circuit to the :
: : the REM does not use a : circuit in the fuel : PCM while the fault :
: : FPM circuit. : pump : is being detected :
: : Diagnostic information : * Locked fuel pump : by the FPDM. If the :
: : will be set through : rotor : fault is no longer :
: : SCP. Indicates that : * Damaged FPDM : detected, the PCM :
: : the FPDM has detected : * For LS6/LS8, : will return to :
: : a fuel pump secondary : circuits associated : sending an "all OK" :
: : circuit fault. The : with the Fuel Pump : (50% duty cycle) :
: : FPDM will send a : relay : message to the PCM. :
: : message to the PCM : : The PCM will keep :
: : through the FPM : : P1237 stored in :
: : circuit, indicating : : Continuous Memory. :
: : that this failure has : : - The FPDM controls :
: : been detected. The PCM : : pump speed by :
: : will set the DTC when : : supplying a :
: : the message is : : "variable" ground :
: : received. : : on the RTN circuit. :
____________________________________________________________________________________________________

: P1238 - Fuel Pump : See DTC P1237. P1238 :
: Secondary Circuit : is identical to P1237 :
: Malfunction : except P1238 will not :
: : illuminate the MIL. :
____________________________________________________________________________________________________

: P1244 - Generator Load : The PCM monitors the : * ALI circuit open : Verify operation of :
: Input Low : GLI circuit, and will : or short : charging system. :
: : set the DTC when the : * Damaged voltage :
: : input is below : regulator/generator :
: : calibrated limit for a : * Damaged PCM :
: : calibrated amount of :
: : time. :
____________________________________________________________________________________________________

: P1245 - Generator Load : The PCM monitors the : * ALI circuit open or : Verify operation of :
: Input High : GLI circuit, and will : short : charging system. :
: : set the DTC when the : * Damaged voltage :
: : input is above a : regulator/generator :
: : calibrated limit for a : * Damaged PCM :
: : calibrated amount of :
: : time. :
____________________________________________________________________________________________________

: P1246 - Generator Load : The PCM monitors the : * ALI circuit : * Verify operation of :
: Input (2.0L Contour : GLI circuit, and will : concern. : charging system. :
: /Mystique/Cougar) : set the DTC when the : * Damaged voltage : * Verify battery is :
: : input is not within a : regulator/generator : at proper charge. :
: : calibrated limit for a : * Damaged PCM. :
: : calibrated amount of :
: : time. :
____________________________________________________________________________________________________

: P1246 - Generator Load : The PCM monitors : * Generator circuit : - Verify battery :
: Input Failed (All : generator load from : short to GND : voltage is 14.5V. :
: Others) : the generator : * Generator circuit : - Verify generator :
: : /regulator in the form : short to PWR : /regulator has the :
: : of frequency. The : * Generator circuit : correct part :
: : frequency range is : open : number. :
: : determined by the : * Generator drive :
: : temperature of the : mechanism :
: : voltage regulator : * Damaged generator :
: : where 97% represents : /regulator assembly :
: : full load, below 6% : * Damaged PCM :
: : means no load. :
____________________________________________________________________________________________________

: P1260 - Theft Detected : Indicates that the : * Previous theft : Theft indicator :
: - Vehicle Immobilized : passive anti-theft : condition : flashing rapidly or on :
: : system (PATS) has : * Anti-Theft System : solid when ignition :
: : determined a theft : failure : switch is in the ON :
: : condition existed and : : position. Check anti :
: : the engine is : : -theft system for :
: : disabled. This DTC is : : DTCs. Typical vehicle :
: : a good indicator to : : symptoms are: Start :
: : check the PATS for : : /Stall or Crank/No :
: : DTCs. : : Start. NOTE: No crank :
: : : : symptom only on :
: : : : vehicles equipped with :
: : : : PATS starter disable :
: : : : feature. :
____________________________________________________________________________________________________

: P1270 - Engine RPM : Indicates the vehicle : * Wheel slippage : The DTC indicates the :
: /Vehicle Speed Limiter : has been operated in a : (water, ice, mud : vehicle has been :
: : manner which caused : and snow) : operated in a manner :
: : the engine or vehicle : * Excessive engine : which caused the :
: : to exceed a : rpm in Neutral : engine or vehicle :
: : calibration limit. The : * Vehicle drive at a : speed to exceed a :
: : engine rpm and vehicle : high rate of speed : calibrated limit. :
: : speed are continuously :
: : monitored by the PCM. :
: : The DTC is set when :
: : the rpm or speed fall :
: : out of calibrated :
: : range. For additional :
: : information on the :
: : engine rpm/vehicle :
: : speed limiter, refer :
: : to Section 1, :
: : Electronic Engine :
: : Control (EC) System, :
: : Powertrain Control :
: : Software. :
____________________________________________________________________________________________________

: P1285 - Cylinder Head : Indicates an engine : * Low engine coolant : On some applications :
: Over Temperature : overheat condition was : level : when this fault occurs :
: Sensed : sensed by the cylinder : * Base engine : the Engine Temperature :
: : head temperature : concerns : warning indicator will :
: : sensor. : * Engine cooling : illuminate and force :
: : : system concerns : the temperature gauge :
: : : * CHT sensor concern : to full H (Hot) zone :
: : : : by ground circuit 39. :
____________________________________________________________________________________________________

: P1288 - Cylinder Head : Indicates the CHT : * Cold engine : Bring engine to :
: Temperature (CHT) : sensor is out of Self : * Engine overheating : operating temperature. :
: Sensor Circuit Out of : -Test range. Engine : * Damaged harness : If cold, re-run self :
: Self-Test Range : not at operating : connector : -test. If engine over :
: : temperature. : * Damaged PCM : -heats check cooling :
: : : * Low engine coolant : system. :
: : : level :
: : : * Damaged CHT sensor :
____________________________________________________________________________________________________

: P1289 - Cylinder Head : Indicates a CHT sensor : * Grounded circuit : Using signal :
: Temperature (CHT) : circuit malfunction : in CHT harness : simulation, disconnect :
: Sensor Circuit High : (shorted). : * Damaged CHT sensor : sensor and simulate a :
: Input (PCM STRATEGIES : : * Improper harness : voltage on sensor :
: UP TO AND INCLUDING : : connection : signal circuit. :
: 1998) : : * Damaged PCM : Simulated 1.0V signal :
: : : : and scan PID voltage :
: : : : value should be :
: : : : similar. If voltage is :
: : : : similar check sensor, :
: : : : if voltage is not :
: : : : similar check related :
: : : : circuit and PCM. Note :
: : : : DTC P0117 may also be :
: : : : reported, this will :
: : : : activate the MIL :
: : : : light. :
____________________________________________________________________________________________________

: P1289 - Cylinder Head : Indicates a CHT sensor : * Open circuit in CHT : Using signal :
: Temperature (CHT) : circuit malfunction : harness : simulation, disconnect :
: Sensor Circuit High : (open). : * Damaged CHT sensor : sensor and simulate a :
: Input (PCM STRATEGIES : : * Improper harness : voltage on sensor :
: 1999 AND BEYOND) : : connection : signal circuit. :
: : : * Damaged PCM : Simulated 1.0V signal :
: : : : and scan PID voltage :
: : : : value should be :
: : : : similar. If voltage is :
: : : : similar check sensor, :
: : : : if voltage is not :
: : : : similar check related :
: : : : circuit and PCM. Note: :
: : : : DTC P0118 may also be :
: : : : reported, this will :
: : : : activate the MIL :
: : : : light. :
____________________________________________________________________________________________________

: P1290 - Cylinder Head : Indicates a CHT sensor : * Open circuit in CHT : Using signal :
: Temperature (CHT) : circuit malfunction : harness : simulation, disconnect :
: Sensor Circuit Low : (open). : * Damaged CHT sensor : sensor and simulate a :
: Input (PCM STRATEGIES : : * Improper harness : voltage on sensor :
: UP TO AND INCLUDING : : connection : signal circuit. :
: 1998) : : * Damaged PCM : Simulated 1.0V signal :
: : : : and scan PID voltage :
: : : : value should be :
: : : : similar. If voltage is :
: : : : similar check sensor, :
: : : : if voltage is not :
: : : : similar check related :
: : : : circuit and PCM. Note :
: : : : DTC P0118 may also be :
: : : : reported, this will :
: : : : activate the MIL :
: : : : light. :
____________________________________________________________________________________________________

: P1290 - Cylinder Head : Indicates a CHT sensor : * Grounded circuit in : Using signal :
: Temperature (CHT) : circuit malfunction : CHT harness : simulation, disconnect :
: Sensor Circuit Low : (shorted). : * Damaged CHT sensor : sensor and simulate a :
: Input (PCM STRATEGIES : : * Improper harness : voltage on sensor :
: 1999 AND BEYOND) : : connection : signal circuit. :
: : : * Damaged PCM : Simulated 1.0V signal :
: : : : and scan PID voltage :
: : : : value should be :
: : : : similar. If voltage is :
: : : : similar check sensor, :
: : : : if voltage is not :
: : : : similar check related :
: : : : circuit and PCM. Note :
: : : : DTC P0117 may also be :
: : : : reported, this will :
: : : : activate the MIL :
: : : : light. :
____________________________________________________________________________________________________

: P1299 - Cylinder Head : Indicates an engine : * Engine cooling : Refer to Section 1, :
: Over Temperature : overheat condition was : system concerns : Electronic Engine :
: Protection Active : detected by the : * Low engine coolant : Control (EC) System, :
: : cylinder head : level : for more information :
: : temperature (CHT) : * Base engine : on Fail-safe Cooling :
: : sensor. An FMEM : concerns : Strategy and cylinder :
: : Strategy called Fail : : head temperature :
: : -safe Cooling was : : sensor. :
: : activated to cool the :
: : engine. :
____________________________________________________________________________________________________

: P1309 - Misfire : When the misfire : * Camshaft position : Verify the CMP is :
: Monitor Disabled : monitor is disabled, : sensor : installed correctly :
: : usually due to the : * Powertrain control : and not out of :
: : input signal generated : module : synchronization. :
: : by the camshaft : * ECT, MAF, and CKP :
: : position (CMP) sensor, : sensors :
: : by sensing the passage :
: : of teeth from the CMP :
: : wheel. :
____________________________________________________________________________________________________

: P1380 - Variable Cam : The comprehensive : * Open or short VCT : DTC P1380 is a VCT :
: Timing Solenoid A : component monitor(CCM) : circuit : circuit check. Testing :
: Circuit Malfunction : monitors the VCT : * Open VPWR circuit : should include wires, :
: : circuit to the PCM for : * Damaged PCM : solenoid coil and PCM. :
: : high and low voltage. : * Open or short VCT :
: : If during testing : solenoid valve :
: : voltage was to fall :
: : below a calibrated :
: : limit a calibrated :
: : amount of time the :
: : test will fail. :
____________________________________________________________________________________________________

: P1381 - Variable Cam : The comprehensive : * Cam timing : P1381 DTC is a check :
: Timing Over-advanced : component monitor : improperly set : of the VCT unit. :
: (Bank 1) : (CCM) monitors the VCT : * No oil flow to the : Testing should not :
: : position for an over : VCT piston chamber : include electrical :
: : -advanced camshaft : * Low oil pressure : checks. Diagnostics :
: : timing. The test fails : * VCT solenoid valve : and repair for the VCT :
: : when the camshaft : stuck closed : unit are located in :
: : timing exceeds a : * Camshaft advance : the Workshop Manual. :
: : maximum calibrated : mechanism binding :
: : value or remains in an : (VCT unit) :
: : advanced position. :
____________________________________________________________________________________________________

: P1383 - Variable Cam : The comprehensive : * Cam timing : DTC P1383 is a check :
: Timing Over-retarded : component monitor : improperly set : of the VCT unit. :
: (Bank 1) : (CCM) monitors the VCT : * Continuous oil flow : Testing should not :
: : position for over : to the VCT piston : include electrical :
: : -retarded camshaft : chamber : checks. Engine will :
: : timing. The test fails : * VCT solenoid valve : idle rough, hard :
: : when the camshaft : stuck open : starting and may :
: : timing exceeds a : * Camshaft advance : stall. Diagnostics and :
: : maximum calibrated : mechanism binding : repair for the VCT :
: : value or remains in an : (VCT unit) : unit are located in :
: : retarded position. : : the Workshop Manual. :
____________________________________________________________________________________________________

: P1390 - Octane Adjust : The octane adjust is : * Powertrain control : Do not activate the :
: (OCTADJ) : software activated in : module (PCM) : octane adjust software :
: : the powertrain control : : unless directed by a :
: : module, used to retard : : Technical Service :
: : spark timing by three : : Bulletin. :
: : degrees. The hardware :
: : shorting bar has been :
: : removed. :
____________________________________________________________________________________________________

: P1400 - DPF EGR Sensor : The EGR monitor checks : * DPFEGR circuit : A DPF EGR PID reading :
: Circuit Low Voltage : the DPF EGR sensor : short to GND : less than 0.2 volt :
: Detected : signal to the PCM for : * Damaged DPF EGR : with the key ON and :
: : low voltage. The test : sensor : engine OFF or running, :
: : fails when the average : * VREF short to GND : indicates a hard :
: : voltage to the PCM : * Damaged PCM : fault. :
: : drops to a voltage :
: : less than the minimum :
: : calibrated value. :
____________________________________________________________________________________________________

: P1401 - DPF EGR Sensor : The EGR monitor checks : * DPF EGR circuit : A DPF EGR PID reading :
: Circuit High Voltage : the DPF EGR sensor : open : greater than 4.5 volts :
: Detected : signal to the PCM for : * VREF short to PWR : with the key ON and :
: : high voltage. The test : * Damaged DPF EGR : engine OFF or running, :
: : fails when the average : sensor : indicates a hard :
: : voltage to the PCM : * DPFEGR circuit : fault. :
: : goes to a voltage : short to PWR :
: : greater than the : * SIG RTN circuit :
: : maximum calibrated : open :
: : value. : * Damaged PCM :
____________________________________________________________________________________________________

: P1405 - DPF EGR Sensor : While driving, the EGR : * Upstream hose is : - Look for signs of :
: Upstream Hose Off or : monitor commands the : disconnected : water or icing in :
: Plugged : EGR valve closed and : * Upstream hose is : hose :
: : checks the : plugged (ice) : - Verify hose :
: : differential pressure : * Plugged or damaged : connection and :
: : across the EGR : EGR tube : routing (no :
: : orifice. The test : : excessive dips) :
: : fails when the signal : : - Verify DPF EGR :
: : from the DPF EGR : : sensor proper :
: : sensor indicates EGR : : mounting and :
: : flow is in the : : function (view DPF :
: : negative direction. : : EGR PID while :
: : : : applying and :
: : : : releasing vacuum :
: : : : directly to sensor :
: : : : with a hand pump) :
____________________________________________________________________________________________________


: P1406 - DPF EGR Sensor : While driving, the EGR : * Downstream hose is : - Look for signs of :
: Downstream Hose Off or : monitor commands the : disconnected : water or icing in :
: Plugged : EGR valve closed and : * Downstream hose is : hose :
: : checks the : plugged (ice) : - Verify connection :
: : differential pressure : * Plugged or damaged : and routing (no :
: : across the EGR : EGR tube : excessive dips) :
: : orifice. The test : : - Verify DPF EGR :
: : fails when the signal : : sensor proper :
: : from the DPF EGR : : mounting and :
: : sensor continues to : : function (view :
: : indicate EGR flow even : : DPFEGR PID while :
: : after the EGR valve is : : applying and :
: : commanded closed. : : releasing vacuum :
: : : : directly to sensor :
: : : : with a hand pump) :
____________________________________________________________________________________________________

: P1408 - EGR Flow Out : This test is performed : See Possible Causes :
: of Self-Test Range : during the KOER on : for DTC P0401. :
: : demand self-test only. :
: : The EGR system is :
: : commanded ON at a :
: : fixed engine speed. :
: : The test fails and the :
: : DTC is output when the :
: : measured EGR flow :
: : falls below the :
: : required calibrated :
: : minimum. :
____________________________________________________________________________________________________

: P1409 - EGR Vacuum : This test checks the : * EGRVR circuit open : The EGR vacuum :
: Regulator Solenoid : electrical function of : * VPWR open to EGRVR : regulator solenoid :
: Circuit Malfunction : the EGRVR. solenoid. : solenoid : resistance is from 26 :
: : The test fails when : * EGRVR circuit short : to 40 ohms. :
: : the EGRVR circuit : to VPWR or GND :
: : voltage is either too : * Damaged EGRVR :
: : high or too low when : solenoid :
: : compared to the : * Damaged PCM :
: : expected voltage :
: : range. The EGR system :
: : must be enabled for :
: : the test to be :
: : completed. :
____________________________________________________________________________________________________

: P1411 - Secondary Air : The secondary air : * Electric AIR Pump : In order to test the :
: Injection (AIR) system : injection system does : * Hose from AIR pump : AIR pump, it must be :
: downstream flow : not detect the : leak : capable of driving the :
: : presence of air in the : * AIR bypass solenoid : HO2S lean. :
: : exhaust when : leak/blocked :
: : introduced by the : * Hose from AIR pump :
: : secondary air : blocked :
: : injection system : * AIR bypass solenoid :
: : : stuck open/closed :
____________________________________________________________________________________________________

: P1413 : The secondary air : * Open B+ circuit : The AIR monitor :
: : injection system : * Open AIR circuit : circuit is held low by :
: : monitor circuit is low : * Damaged PCM : the resistance path :
: : , indicating the : * Air circuit short : through the AIR pump :
: : electrical AIR pump is : to ground : when the pump is off. :
: : off although the : * Damaged AIR pump : Also, look for open :
: : electrical AIR pump : * Damaged solid state : circuit from SSR to :
: : was commanded on by : relay : AIR pump. :
: : the PCM. :
____________________________________________________________________________________________________

: P1414 : The secondary air : * Open AIR monitor :
: : injection system : circuit from the :
: : monitor circuit is : pump :
: : high, indicating the : * AIR circuit short :
: : electrical AIR pump is : to power :
: : on although the : * Damaged solid state :
: : electrical AIR pump : relay :
: : was commanded off by : * Open AIR pump :
: : the PCM. : ground :
: : : * Damaged AIR pump :
: : : * Damaged PCM :
____________________________________________________________________________________________________

: P1443 - Very Small Or : A fuel tank pressure : * Blocked fuel vapor : Check for blockages :
: No Purge Flow : change greater than a : hose between EVAP : between the fuel tank, :
: Condition : minus (-) 7 inches of : canister purge : EVAP canister purge :
: : H (2) O in 30 seconds : valve and FTP : valve and engine :
: : has occurred with : sensor. : intake manifold. Check :
: : purge (fuel vapor) : * Blocked fuel vapor : obstructions in the :
: : flow less than 0.02 : hose between EVAP : EVAP canister purge :
: : pounds per minute. : canister purge : valve diaphragm and :
: : : valve and engine : ports. :
: : : intake manifold. :
: : : * Blocked vacuum hose :
: : : between EVAP :
: : : canister purge :
: : : valve-solenoid and :
: : : engine intake :
: : : manifold. :
: : : * EVAP canister purge :
: : : valve stuck closed :
: : : (mechanically). :
____________________________________________________________________________________________________

: P1450 - Unable to : Monitors the fuel : * Blockages or kinks :
: Bleed Up Fuel Tank : vapor vacuum and : in EVAP canister :
: Vacuum : pressure in the fuel : tube or EVAP :
: : tank. The system : canister purge :
: : failure occurs when : outlet tube :
: : the EVAP running loss : (between fuel tank, :
: : monitor detects : EVAP canister purge :
: : excessive fuel tank : valve and EVAP :
: : vacuum with the engine : canister) :
: : running (but not at : * Fuel filler cap :
: : idle). : stuck closed (no :
: : : vacuum relief) :
: : : * Contaminated fuel :
: : : vapor elbow on EVAP :
: : : canister :
: : : * Restricted EVAP :
: : : canister :
: : : * CV solenoid stuck :
: : : open (partially or :
: : : fully) :
: : : * Plugged CV solenoid :
: : : filter :
: : : * EVAP canister purge :
: : : valve stuck open :
: : : * VREF circuit open :
: : : (harness near FTP :
: : : sensor, FTP sensor :
: : : or PCM) :
: : : * Damaged FTP sensor :
____________________________________________________________________________________________________

: P1451 - EVAP Control : Monitors the canister : * VPWR circuit open : - Monitor EVAPCV PID :
: System Canister Vent : vent (CV) solenoid : * CV solenoid circuit : and voltage between :
: Solenoid Circuit : circuit for an : shorted to PWR GND : canister vent :
: Malfunction : electrical failure. : or CHASSIS GND : solenoid signal and :
: : The test fails when : * Damaged CV solenoid : PWR GND in output :
: : the signal moves : * CV solenoid circuit : test mode with key :
: : outside the minimum or : open : ON engine OFF (or :
: : maximum allowable : * CV solenoid circuit : in key ON engine :
: : calibrated parameters : shorted to VPWR : RUNNING mode) :
: : for a specified : * Damaged PCM : - EVAPCV PID at 0% :
: : canister vent duty : : and voltage less :
: : cycle by PCM command. : : than 1.0 volt (or :
: : : : EVAPCV PID at 100% :
: : : : and voltage greater :
: : : : than 0.5 volt) :
: : : : indicates a hard :
: : : : fault :
____________________________________________________________________________________________________

: P1460 - Wide Open : NOTE: For applications : * Open or shorted WAC : - When the WACF PID :
: Throttle A/C Cutout : that use a normally : circuit : reads YES, a fault :
: Primary Circuit : open relay to control : * Damaged WAC relay : is currently :
: Malfunction : the A/C clutch, the : (or CCRM) : present :
: : following description : * Open VPWR circuit : - An open circuit or :
: : applies to the A/C : to WAC relay : short to ground can :
: : clutch relay control : * Damaged PCM : only be detected :
: : circuit. Monitors the : : when the PCM is not :
: : wide open throttle A/C : : grounding the :
: : cutoff (WAC) circuit : : circuit :
: : output from the PCM. : : - A short to power :
: : The test fails if: : : can only be :
: : When the PCM grounds : : detected when the :
: : the WAC circuit, : : PCM is grounding :
: : excessive current draw : : the circuit :
: : is detected on the WAC : : - During KOEO and :
: : circuit; or with the : : KOER self-test, the :
: : WAC circuit not : : WAC circuit will be :
: : grounded by the PCM, : : cycled ON and OFF :
: : voltage is not : : - Verify A/C and :
: : detected on the WAC : : defrost were OFF :
: : circuit (the PCM : : during KOEO and :
: : expects to detect VPWR : : KOER self-test :
: : voltage coming through : : (Check ACCS PID to :
: : the WAC relay coil to : : verify) :
: : the WAC circuit). : : - If vehicle is not :
: : : : equipped with A/C, :
: : : : DTC P1460 can be :
: : : : ignored :
____________________________________________________________________________________________________

: P1461 - Air : ACP inputs a voltage : * ACP sensor circuit : Verify VREF voltage :
: Conditioning Pressure : to the PCM. If the : short to PWR : between 4.0 and 6.0V. :
: Sensor (ACP) Sensor : voltage is above a : * ACP circuit open :
: High Voltage Detected : calibrated level the : * Damaged PCM :
: : DTC will set. : * ACP circuit short :
: : : to VREF :
: : : * ACP circuit short :
: : : to SIGRTN :
: : : * Damaged ACP sensor :
____________________________________________________________________________________________________

: P1462 - Air : ACP inputs a voltage : * ACP circuit short : Verify VREF voltage :
: Conditioning Pressure : to the PCM. If the : to GND or SIGRTN : between 4.0 and 6.0V. :
: Sensor (ACP) Sensor : voltage is below the : * VREF circuit open :
: Low Voltage Detected : calibrated level the : * Damaged PCM :
: : DTC will set. : * Open ACP circuit :
: : : * Damaged ACP sensor :
____________________________________________________________________________________________________

: P1463 - Air : Each time the A/C : * A/C system : Verify A/C system :
: Conditioning Pressure : clutch engages, the : mechanical failure : function, including :
: Sensor (ACP) : PCM is looking for a : * Open ACP or VREF : refrigerant charge. :
: Insufficient Pressure : pressure change in the : circuit :
: Change : refrigerant. If the : * A/C sensor damaged :
: : change in pressure is : * A/C system :
: : outside of the : electrical failure :
: : calibration the DTC : * A/C clutch always :
: : will set. : engaged :
____________________________________________________________________________________________________

: P1464 - A/C Demand Out : Indicates the ACCS : * A/C was on during : If A/C or defrost were :
: Of Self-Test Range : input to the PCM was : self-test : on during self-test, :
: : high during Self-Test. : * A/C Clutch PWR : turn off and rerun :
: : : circuit short to : test. :
: : : power (applications :
: : : with N/C WAC relay :
: : : contacts) :
: : : * ACCS circuit short :
: : : to power :
: : : * Damaged A/C demand :
: : : switch :
: : : * Damaged WAC relay :
: : : (or CCRM) :
: : : * Damaged PCM :
____________________________________________________________________________________________________

: P1469 - Low A/C : Indicates frequent A/C : * Mechanical A/C : - An intermittent :
: Cycling Period : compressor clutch : system concern : open circuit, :
: : cycling. : (such as low : although possible, :
: : : refrigerant charge, : is unlikely :
: : : damaged A/C cycling : - This test was :
: : : switch) : designed to protect :
: : : * Intermittent open : the transmission. :
: : : between the cycling : In some strategies, :
: : : pressure switch and : the PCM will unlock :
: : : pin 41 (ACCS) to : the torque :
: : : the PCM : converter during A :
: : : * Intermittent open : /C clutch :
: : : in IGN RUN circuit : engagement. If a :
: : : to cycling pressure : concern is present :
: : : switch (if : that results in :
: : : applicable) : frequent A/C clutch :
: : : : cycling, damage :
: : : : could occur if the :
: : : : torque converter :
: : : : was cycled at these :
: : : : intervals. This :
: : : : test will detect :
: : : : this condition, set :
: : : : the DTC and prevent :
: : : : the torque :
: : : : converter from :
: : : : excessive cycling. :
____________________________________________________________________________________________________

: P1474 - Low Fan : Monitors the low fan : * Open or shorted LFC : - When the LFC PID :
: Control Primary : control (LFC) (fan : /FC circuit : reads YES, a fault :
: Circuit Failure : control [FC] for one : * Open VPWR circuit : is currently :
: : speed fan application) : to low speed fan : present :
: : primary circuit output : relay : - An open circuit or :
: : from the PCM. The test : * Damaged fuel pump : short to ground can :
: : fails if: When the PCM : relay (or CCRM) : only be detected :
: : grounds the LFC/FC : * Damaged PCM : when the PCM is not :
: : circuit, excessive : : grounding the LFC :
: : current draw is : : /FC circuit :
: : detected on the LFC/FC : : - A short to power :
: : circuit; or with the : : can only be :
: : LFC/FC circuit not : : detected when the :
: : grounded by the PCM, : : PCM is grounding :
: : voltage is not : : the LFC/FC circuit. :
: : detected on the LFC/FC : : During KOEO and :
: : circuit (the PCM : : KOER Self-Test, the :
: : expects to detect VPWR : : LFC/FC circuit will :
: : voltage coming through : : be cycled on and :
: : the low speed fan : : off :
: : relay [or CCRM] coil :
: : to the LFC/FC :
: : circuit). :
____________________________________________________________________________________________________

: P1474 - Hydraulic : This test checks the : * HCF circuit open : The HCF solenoid is :
: Cooling Fan Primary : electrical function of : * HCF circuit short : integrated in the HCF :
: Circuit Failure (HCF) : the (HCF) primary : to power : pump which looks like :
: : circuit. The test : * HCF circuit short : a power steering pump. :
: : fails if: the PCM : to ground : The electrical :
: : detects voltage either : * Damaged HCF : resistance of the :
: : too high or too low : solenoid : solenoid windings is :
: : when compared to the : * Damaged PCM : nominally 10 ohms. :
: : expected voltage range :
: : on the (HCF) primary :
: : circuit. :
____________________________________________________________________________________________________

: P1479 - High Fan : Monitors the high fan : * Open or shorted HFC : - When the HFC PID :
: Control Primary : control (HFC) primary : circuit : reads YES, a fault :
: Circuit Failure : circuit output from : * Open VPWR circuit : is currently :
: : the PCM. The test : to high speed fan : present :
: : fails if: With the HFC : relay : - An open circuit or :
: : output commanded on : * Damaged high speed : short to ground can :
: : (grounded), excessive : fan relay (or CCRM) : only be detected :
: : current draw is : * Damaged PCM : when the PCM is not :
: : detected on the HFC : : grounding the HFC :
: : circuit; or with the : : circuit :
: : HFC circuit commanded : : - A short to power :
: : off, voltage is not : : can only be :
: : detected on the HFC : : detected when the :
: : circuit (the PCM : : PCM is grounding :
: : expects to detect VPWR : : the HFC circuit :
: : voltage coming through : : - During KOEO and :
: : the high speed fan : : KOER self-test, the :
: : relay [or CCRM] coil : : HFC circuit will be :
: : to the HFC circuit). : : cycled on and off :
____________________________________________________________________________________________________

: P1500 - Vehicle Speed : Indicates the VSS : * Intermittent VSS :
: Sensor (VSS) : input signal was : connections :
: Intermittent : intermittent. This DTC : * Intermittent open :
: : is set when a VSS : in VSS harness :
: : fault interferes with : circuit(s) :
: : other OBDII tests, : * Intermittent short :
: : such as Catalyst : in VSS harness :
: : efficiency monitor, : circuit(s) :
: : EVAP monitor, HO2S : * Damaged VSS :
: : monitor, etc. : * Damaged PCM :
____________________________________________________________________________________________________

: P1501 - Vehicle Speed : Indicates the VSS : * Noisy VSS input : Check for VSS input to :
: Sensor (VSS) Out of : input signal is out of : signal from Radio : be 0 mph when vehicle :
: Self Test Range : Self Test range. If : Frequency : transmission is in :
: : the PCM detects a VSS : Interference/ : Park. :
: : input signal any time : Electro-Magnetic :
: : during Self Test, a : Interference (RFI :
: : DTC P1501 will be set : /EMI) external :
: : and the test will : sources such as :
: : abort. : ignition wires, :
: : : charging circuit or :
: : : after market :
: : : equipment. :
____________________________________________________________________________________________________

: P1502 - Vehicle Speed : Indicates the : * Refer to possible : Refer to diagnostic :
: Sensor (VSS) : powertrain control : causes for P0500. : aids for P0500. :
: Intermittent : module (PCM) detected :
: : an error in the :
: : vehicle speed :
: : information. Vehicle :
: : speed data is received :
: : from either the :
: : vehicle speed sensor :
: : (VSS), transfer case :
: : speed sensor (TCSS), :
: : anti-lock brake system :
: : (ABS) control module, :
: : generic electronic :
: : module (GEM), or :
: : central timer module :
: : (CTM). This DTC is set :
: : the same way as P0500. :
: : However, it is :
: : intended to flash the :
: : transmission control :
: : indicator lamp (TCIL) :
: : for first time VSS :
: : circuit error :
: : /malfunctions. :
____________________________________________________________________________________________________

: P1502 - Vehicle Speed : Indicates the : Refer to possible : Refer to diagnostic :
: Sensor (VSS) : powertrain control : causes for P0500 : aides for P0500 :
: Intermittent (TCIL : module (PCM) detected :
: illuminates) : an error in the :
: : vehicle speed :
: : information. Vehicle :
: : speed data is received :
: : from either the :
: : vehicle speed sensor :
: : (VSS), anti-lock brake :
: : system (ABS) control :
: : module, generic :
: : electronic module :
: : (GEM), or central :
: : timer module (CTM). :
: : This DTC is set the :
: : same way as P0500. :
: : However, it is :
: : intended to flash the :
: : transmission control :
: : indicator lamp (TCIL) :
: : for first time VSS :
: : circuit error :
: : /malfunctions. :
____________________________________________________________________________________________________

: P1504 - Idle Air : This DTC is set when : * IAC circuit open : - The IAC solenoid :
: Control (IAC) Circuit : the PCM detects an : * VPWR to IAC : resistance is from :
: Malfunction : electrical load : solenoid open : 6 to 13 ohms. :
: : failure on the IAC : * IAC circuit short : * IAC valve stuck :
: : output circuit. : to PWR : open :
: : : * IAC circuit short : * Vacuum leaks :
: : : to GND : * Failed EVAP :
: : : * Damaged IAC valve : system :
: : : * Damaged PCM : * Damaged PCM :
: : : : - The IAC solenoid :
: : : : resistance is from :
: : : : 6 to 13 ohms. :
____________________________________________________________________________________________________

: P1506 - Idle Air : This DTC is set when : * IAC circuit short : Disconnect IAC valve :
: Control (IAC) : the PCM detects engine : to GND : and look for little or :
: Overspeed Error : idle speed that is : * Damaged IAC valve : no change in engine :
: : greater than the : : rpm as an indication :
: : desired rpm. : : of a stuck or damaged :
: : : : valve. :
____________________________________________________________________________________________________

: P1507 - Idle Air : This DTC is set when : * IAC circuit open : - The IAC solenoid :
: Control (IAC) : the PCM detects engine : * IAC circuit short : resistance is from :
: Underspeed Error : idle speed that is : to PWR : 6 to 13 ohms :
: : less than the desired : * VPWR to IAC : - Disconnect IAC :
: : rpm. : solenoid open : valve and look for :
: : : * Air inlet is : no change in engine :
: : : plugged : rpm as an :
: : : * Damaged IAC : indication of a :
: : : solenoid : stuck or damaged :
: : : * Damaged PCM : valve :
____________________________________________________________________________________________________

: P1516 - Intake :
: Manifold Runner :
: Control Input Error :
: (Bank 1) :
____________________________________________________________________________________________________

: P1517 - Intake : The IMRC system is : * Mechanical concern : - An IMRCM PID :
: Manifold Runner : monitored for failure : - bind, seize, : reading at closed :
: Control Input Error : during continuous or : damage or : throttle that is :
: (Bank 2) : key ON engine OFF self : obstruction of IMRC : less than VREF may :
: : -test. Each DTC will : hardware : indicate a fault :
: : distinguish the : : - An IMRCM PID :
: : corresponding failed : : reading near 1 volt :
: : bank for IMRC actuator : : or greater with :
: : assemblies with dual : : engine rpm of at :
: : monitor switches. The : : least 3000 may :
: : test fails when the : : indicate a fault :
: : signal on the monitor :
: : pin is outside an :
: : expected calibrated :
: : range. :
____________________________________________________________________________________________________

: P1518 - Intake : The IMRC system is : * IMRC monitor signal : An IMRCM PID reading :
: Manifold Runner : monitored for failure : circuit shorted to : approximately near 1 :
: Control Malfunction : during continuous, key : PWR GND or SIG RTN : volt at closed :
: (Stuck Open) : ON engine OFF or key : * Damaged IMRC : throttle may indicate :
: : ON engine running self : actuator : a fault :
: : -test. The test fails : * Damaged PCM :
: : when the signal on the :
: : monitor pin is less :
: : than an expected :
: : calibrated range at :
: : closed throttle. :
____________________________________________________________________________________________________

: P1519 - Inlet Manifold : The IMRC system is : * IMRC monitor : An IMRCM PID reading :
: Runner Control : monitored for failure : circuit open : at VREF with engine :
: Malfunction (Stuck : during continuous, key : * IMRC control : rpm of at least 3000 :
: Closed) : ON engine OFF or key : circuit open : may indicate a fault. :
: : ON engine running self : * IMRC monitor :
: : -test. The test fails : circuit short to :
: : when the signal on the : VREF :
: : monitor pin is more : * IMRC monitor return :
: : than an expected : circuit open :
: : calibrated range with : * Damaged IMRC :
: : IMRC activated. : actuator :
: : : * IMRC VPWR circuit :
: : : open :
: : : * Damaged PCM :
____________________________________________________________________________________________________

: P1549 - Intake : The IMCC or intake : * Open IMT valve : - An IMT valve fault :
: Manifold Communication : manifold tuning (IMT) : circuit : PID (IMTVF) displaying :
: Control Circuit : valve system is : * Open VPWR circuit : YES status may :
: Malfunction : monitored for failure : * Shorted IMT valve : indicate a fault :
: : during continuous or : circuit : - The DTC indicates :
: : key ON engine OFF self : * Damaged IMT valve : the PSP sensor :
: : -test. The test fails : * Damaged PCM : is out of Self :
: : when the PCM detects a : * PSP sensor damaged : -Te :
: : concern with IMT valve : * Damaged PCM :
: : output circuit. :
____________________________________________________________________________________________________

: P1550 - Power Steering : The PSP sensor input :
: Pressure (PSP) Sensor : signal to PCM is :
: Malfunction : continuously :
: : monitored. The test :
: : fails when the signal :
: : falls out of a maximum :
: : or minimum calibrated :
: : range. :
____________________________________________________________________________________________________

: P1605 - Keep Alive : Indicates the PCM has : * Reprogramming : If KAPWR is :
: Memory Test Failure : experienced an : * Battery terminal : interrupted to the PCM :
: : internal memory test : corrosion : , because of a battery :
: : failure. However there : * Damaged PCM : or PCM disconnect, DTC :
: : are external items : * KAPWR to PCM : can be generated on :
: : that can cause this : interrupt/open : the first power-up. :
: : DTC. : * Loose battery :
: : : connection :
____________________________________________________________________________________________________

: P1633 - Keep Alive : Indicates that the : * Open KAPWR circuit :
: Power Voltage Too Low : Keep Alive Power : * Damaged PCM :
: : (KAPWR) circuit has : * Intermittent KAPWR :
: : experienced a power : Circuit :
: : interrupt. :
____________________________________________________________________________________________________

: P1635 - Tire/Axle : This Diagnostic : * Incorrect tire size : Using the scan tool, :
: Ratio Out Of : Trouble Code (DTC) : * Incorrect axle : view the tire and axle :
: Acceptable Range : indicates the tire and : ratio : parameters within the :
: : axle information : * Incorrect VID : VID. They must match :
: : contained in Vehicle : configuration : vehicle hardware. :
: : ID block (VID) does : parameters :
: : not match vehicle :
: : hardware. :
____________________________________________________________________________________________________

: P1640 - Powertrain : Vehicles using a : * DTCs stored in a : Call-up PID address :
: DTC's Available in : secondary Engine : secondary module, : 0946 to determine :
: Another Module : Control Module can : which requested the : secondary module :
: : request that the : MIL to be turned : requesting MIL :
: : Powertrain Control : on. : illumination. Once :
: : Module illuminate the : : secondary module is :
: : Check Engine Light : : determined request :
: : when a failure occurs : : DTCs from module. :
: : which affect emission. :
____________________________________________________________________________________________________

: P1650 - Power Steering : In Key On, Engine Off : * Steering wheel must :
: Pressure (PSP) Switch : Self-Test, this DTC : not be turned :
: Malfunction : indicates the PSP : during Key On, :
: : input to the PCM is : Engine Running Self :
: : high. In Key On, : -Test :
: : Engine Running Self : * PSP switch/shorting :
: : -Test, this DTC : bar damaged :
: : indicates that the PSP : * SIG RTN circuit :
: : input did not change : open :
: : state. : * PSP circuit open or :
: : : shorted to SIGRTN :
: : : * PCM damaged :
____________________________________________________________________________________________________

: P1651 - Power Steering : The PCM counts the : * Vehicle towed with : - Check, if possible, :
: Pressure (PSP) Switch : number of times : engine running : if vehicle was :
: Signal Malfunction : vehicle speed : * Power steering : towed or power :
: : transitions from 0 to : hydraulic concern : steering service :
: : a calibratable speed. : was repaired but : was performed. :
: : After a calibratable : DTC was not erased : - Observe PSP V PID :
: : number of speed : * PSP switch/shorting : while checking :
: : transitions the PCM : bar damaged : wires for :
: : expects that the PSP : * SIG RTN circuit : intermittents. :
: : input should have : open :
: : changed. This DTC is : * PSP circuit open or :
: : set if the transition : shorted to SIGRTN :
: : is not detected. : * PCM damaged :
____________________________________________________________________________________________________

: P1703 - Brake Switch : Indicates that during : * Open or short in : Check for proper :
: Out of Self-Test Range : Key On Engine Off : (BPP) circuit : function of stoplamps. :
: : (KOEO) Self-Test, BPP : * Open or short in : Follow correct Self :
: : signal was high. Or : stoplamp circuits : -Test procedures, :
: : during Key On Engine : * Damaged PCM : refer to Section 2 :
: : Running (KOER) Self : * Malfunction in : Quick Test. :
: : -Test, the BPP signal : module(s) connected :
: : did not cycle high and : to BPP circuit :
: : low. : (Rear Electronic :
: : : Module [REM] :
: : : Windstar and LS6 :
: : : /LS8 and Lighting :
: : : Control Module :
: : : (LCM) Continental :
: : : and Town Car) :
: : : * Damaged Brake :
: : : Switch :
: : : * Misadjusted Brake :
: : : Switch :
____________________________________________________________________________________________________

: P1705 - Transmission :
: Range Sensor Out of :
: Self-Test Range :
____________________________________________________________________________________________________

: P1709 - Park/Neutral : The DTCs indicate that : * PNP/CPP circuit : When exercising either :
: Position Switch Out of : the voltage is high : short to PWR : the PNP or CPP switch :
: Self-Test Range : when it should be low. : * Damaged PNP or CPP : the voltage should :
: : : switch : cycle from 5.0V to low :
: : : * PNP/CPP circuit :
: : : open in the SIGRTN :
: : : * Damaged PCM :
____________________________________________________________________________________________________

: P1729 - 4x4L Switch : The 4x4L switch is an : * 4x4L harness open : Verify the 4x4L switch :
: Malfunction : ON/OFF. If the PCM : or shorted : cycles ON/OFF. :
: : does not see low : * Damaged electronic :
: : voltage when the : shift module :
: : switch is ON a DTC : * Damaged PCM :
: : will set. :
____________________________________________________________________________________________________

: P1780 - Transmission : During KOER self-test : * TCS circuit short : Verify the TCS switch :
: Control Switch Out of : the TCS has to be : or open : cycles ON/OFF :
: Self-Test Range : cycled, if not cycled : * Damaged TCS switch :
: : a DTC is set. : * Damaged PCM :
____________________________________________________________________________________________________

: P1781 - 4x4L Switch : The 4x4L switch is an : * 4x4L harness open : Verify the 4x4L switch :
: Out of Self-Test Range : ON/OFF. If the PCM : or shorted : cycles ON/OFF :
: : does not see low : * Damaged electronic :
: : voltage when the : shift module :
: : switch is on a DTC : * Damaged PCM :
: : will set. :
____________________________________________________________________________________________________

: P1900 - Output Shaft : See DTC P0723 :
: Speed sensor circuit :
: intermittent failure :
____________________________________________________________________________________________________