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Where to start with these codes?
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<blockquote data-quote="hotcobra03" data-source="post: 16209956" data-attributes="member: 53096"><p>I just looked thru pin tests</p><p></p><p>What ever you did with installation of items is most likely cause. </p><p></p><p>Fpdm. </p><p></p><p>234. In list of causes to trigger </p><p>Low </p><p></p><p>P0234 - Supercharger Overboost Condition The PCM disables (bypasses) the supercharger boost and sets a diagnostic trouble code (DTC) to keep from damaging the powertrain (engine or transmission) during potential harmful operating conditions.</p><ul> <li data-xf-list-type="ul">Brake torque (brake on and throttle at wide open)<br /> <br /> </li> <li data-xf-list-type="ul">Transmission oil temperature (TOT) exceeds calibrated threshold<br /> <br /> </li> <li data-xf-list-type="ul">Engine over temperature<br /> <br /> </li> <li data-xf-list-type="ul">Ignition misfire exceeds calibrated threshold<br /> <br /> </li> <li data-xf-list-type="ul">Knock sensor (KS) failure or knock detected<br /> <br /> </li> <li data-xf-list-type="ul">Low speed fuel pump relay not switching<br /> </li> </ul><p> Check for other diagnostic trouble codes accompanying the P0234 or check appropriate and available PIDs related to above possible causes.</p><p></p><p>148</p><p>P0148 - Fuel Delivery Error At least one bank lean at wide open throttle.</p><ul> <li data-xf-list-type="ul">Severely restricted fuel filter.<br /> <br /> </li> <li data-xf-list-type="ul">Severely restricted fuel supply line.<br /> <br /> </li> <li data-xf-list-type="ul">Damaged or contaminated mass air flow (MAF) sensor.<br /> <br /> 1237<br /> </li> </ul><p>P1237 - Fuel Pump Secondary Circuit Malfunction </p><p>Note: For LS6/LS8 and Thunderbird, the FPDM functions are incorporated in the rear electronics module (REM). Also, the REM does not use a FPM circuit. Diagnostic information will be set through SCP.</p><p></p><p>P1237 indicates that the FPDM has detected a fuel pump secondary circuit fault. The FPDM will send a message to the PCM through the FPM circuit, indicating that this failure has been detected. The PCM will set the DTC when the message is received.</p><ul> <li data-xf-list-type="ul">Open or shorted FP PWR circuit<br /> <br /> </li> <li data-xf-list-type="ul">Open FP RTN circuit to FPDM<br /> <br /> </li> <li data-xf-list-type="ul">Open or shorted circuit in the fuel pump<br /> <br /> </li> <li data-xf-list-type="ul">Locked fuel pump rotor<br /> <br /> </li> <li data-xf-list-type="ul">Damaged FPDM<br /> <br /> </li> <li data-xf-list-type="ul">For LS6/LS8 and Thunderbird, circuits associated with the Fuel Pump relay<br /> </li> </ul><p></p><ul> <li data-xf-list-type="ul">The FPDM sends a 75% duty cycle (750 msec ON, 250 msec OFF) through the FPM circuit to the PCM while the fault is being detected by the FPDM. If the fault is no longer detected, the PCM will return to sending an "all OK" (50% duty cycle) message to the PCM. The PCM will keep P1237 stored in Continuous Memory.<br /> <br /> </li> <li data-xf-list-type="ul">The FPDM controls pump speed by supplying a "variable" ground on the RTN circuit.<br /> <br /> </li> </ul></blockquote><p></p>
[QUOTE="hotcobra03, post: 16209956, member: 53096"] I just looked thru pin tests What ever you did with installation of items is most likely cause. Fpdm. 234. In list of causes to trigger Low P0234 - Supercharger Overboost Condition The PCM disables (bypasses) the supercharger boost and sets a diagnostic trouble code (DTC) to keep from damaging the powertrain (engine or transmission) during potential harmful operating conditions. [LIST] [*]Brake torque (brake on and throttle at wide open) [*]Transmission oil temperature (TOT) exceeds calibrated threshold [*]Engine over temperature [*]Ignition misfire exceeds calibrated threshold [*]Knock sensor (KS) failure or knock detected [*]Low speed fuel pump relay not switching [/LIST] Check for other diagnostic trouble codes accompanying the P0234 or check appropriate and available PIDs related to above possible causes. 148 P0148 - Fuel Delivery Error At least one bank lean at wide open throttle. [LIST] [*]Severely restricted fuel filter. [*]Severely restricted fuel supply line. [*]Damaged or contaminated mass air flow (MAF) sensor. 1237 [/LIST] P1237 - Fuel Pump Secondary Circuit Malfunction Note: For LS6/LS8 and Thunderbird, the FPDM functions are incorporated in the rear electronics module (REM). Also, the REM does not use a FPM circuit. Diagnostic information will be set through SCP. P1237 indicates that the FPDM has detected a fuel pump secondary circuit fault. The FPDM will send a message to the PCM through the FPM circuit, indicating that this failure has been detected. The PCM will set the DTC when the message is received. [LIST] [*]Open or shorted FP PWR circuit [*]Open FP RTN circuit to FPDM [*]Open or shorted circuit in the fuel pump [*]Locked fuel pump rotor [*]Damaged FPDM [*]For LS6/LS8 and Thunderbird, circuits associated with the Fuel Pump relay [/LIST] [LIST] [*]The FPDM sends a 75% duty cycle (750 msec ON, 250 msec OFF) through the FPM circuit to the PCM while the fault is being detected by the FPDM. If the fault is no longer detected, the PCM will return to sending an "all OK" (50% duty cycle) message to the PCM. The PCM will keep P1237 stored in Continuous Memory. [*]The FPDM controls pump speed by supplying a "variable" ground on the RTN circuit. [/LIST] [/QUOTE]
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