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SVT Shelby GT500
'12 Shelby w/ random o2 failure - PCM on its way out?
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<blockquote data-quote="JeremyAlan" data-source="post: 12025974" data-attributes="member: 48798"><p>So as you can see by the thread title I have a 2012 Shelby that I'm working on(gf's car). We had it on the dyno the other day and the Bank 2 Sensor 1 flatlined at 0.00, intermittently it would come back and read A/F for a few minutes then back to nothing. </p><p></p><p>I went to trouble shoot the problem today and while i was driving it down the highway when they both began reading, shortly after Bank 1 Sensor 1 flatlined. So, the problem switched sides for no apparent reason. I pulled over into a parking lot and continued to watch the aeroforce gauge. While idling the B1S1 would momentarily return with an A/F reading, then turn off again. I drove the car home and the B1S1 would read for about 1-2 minutes at random and when it did the reading was fluctuating wildly from -2 to +4 of the B2S1 sensor.</p><p></p><p>Also, as a side note every time i start the car it has a check engine light on. The aeroforce cannot read the code but, when it was on the dyno the tuner told me it was a B2S1 heater circuit failure. Another note to add is these o2 sensors have about 600-800 miles on them and are brand new from Ford. We had a heater circuit failure on this car before and replaced both o2's.</p><p></p><p>Mods:</p><p>2.9 whipple (un-tuned because of the o2's)</p><p>72lb injectors</p><p>FRPP CJ TB</p><p>10% lower</p><p>BAP</p><p>JLT Intake</p><p>Full Stainless works exhaust</p><p></p><p>I'm convinced its a PCM failure since the problem swapped sides without any reason. Any feedback or run-in's with this kind of problem?</p><p></p><p>Thanks</p></blockquote><p></p>
[QUOTE="JeremyAlan, post: 12025974, member: 48798"] So as you can see by the thread title I have a 2012 Shelby that I'm working on(gf's car). We had it on the dyno the other day and the Bank 2 Sensor 1 flatlined at 0.00, intermittently it would come back and read A/F for a few minutes then back to nothing. I went to trouble shoot the problem today and while i was driving it down the highway when they both began reading, shortly after Bank 1 Sensor 1 flatlined. So, the problem switched sides for no apparent reason. I pulled over into a parking lot and continued to watch the aeroforce gauge. While idling the B1S1 would momentarily return with an A/F reading, then turn off again. I drove the car home and the B1S1 would read for about 1-2 minutes at random and when it did the reading was fluctuating wildly from -2 to +4 of the B2S1 sensor. Also, as a side note every time i start the car it has a check engine light on. The aeroforce cannot read the code but, when it was on the dyno the tuner told me it was a B2S1 heater circuit failure. Another note to add is these o2 sensors have about 600-800 miles on them and are brand new from Ford. We had a heater circuit failure on this car before and replaced both o2's. Mods: 2.9 whipple (un-tuned because of the o2's) 72lb injectors FRPP CJ TB 10% lower BAP JLT Intake Full Stainless works exhaust I'm convinced its a PCM failure since the problem swapped sides without any reason. Any feedback or run-in's with this kind of problem? Thanks [/QUOTE]
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'12 Shelby w/ random o2 failure - PCM on its way out?
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