Now I installed my gauges last wednesday and everything was fine 28psi of boost and FP was 12psi at idle and 5 at WOT(which sucks). Then the next day I cranked it up and FP was at 12 a idle then a mile down the road it dropped to 4psi and stays there. So I figure my LP was dying. Well I go out and check my truck for any trouble codes because my FP is at 4psi and was looking for fueling codes, but came up with a P0602 (ECM/PCM calibration/programming error) and a P0234 (Engine overboost condition, turbo boost limit exceeded). What could have caused this? I took my superchips off and reinstalled it a while back and checked for codes afterwards and came up with nothing. Any Ideas?

 

SuperDave4X4,
If you have a boost elbow or something else that would let your turbo exceed the factory spec..I guess around 21psi and your tuner isn't plugged in , the high boost pressure the computer sees will set that code.
I'm sorry but I can't help with the P0602...I don't know what that is.

Did you know you can post a picture of Clifferd the Big Red Dodge at this site?

 

Yeah I didnt even think about that because I do have a boost elbow.

And yes I know about the gallery, I just havent resized my pics yet.

 

Any ideas....anyone??

 

Did you disconnect the boost elbow and reset the codes?

 

P0602 (M) ECM Fueling Calibration Error ECM Internal fault condition detected.

 

I know what the code means, I need to figure out what threw it. Could it be my dead lift pump throwing the code? I would think so..