Make sure to connect an AGM compatible battery charger while programming. Low battery voltage will cause a multitude of programming issues.
Check engine light after removing COBB
- Thread starter patire19
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- cel check engine light cobb
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Have you had your truck since new? Have you/any previous owners tuned the truck before installing the AP? Definitely an odd one that we haven't seen before - hope that we can find a solution for you.
i was the 2nd owner, truck was never tuned. I had the tune on for 3 years with no issues till now. Just shot you guys an email. Dealer is saying that the CEL is for incompatible communication with the PCM, this is something that happens typically when you install a tune. it will not let them update the PCM.
The dealer needs to reference General Service Bulletin (GSB) 21-7122 on PTS and follow Module Programming Routine #2 to reflash the PCM to the factory calibration.
Dealer ended up not being able to clear the code and questioned me on if i ever had a tune. Took the truck back and was able to speak with COBB and they advised me to change the tire settings to 33.2 without having tune installed. This cleared the CEL and all seems to be good now.
Gen1TillDeath
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Glad to hear it!
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