Hello all! I need help, bad. Any suggestions are welcome. I recently purchased an 06 SS / SC, 50,000 miles. I'm a tech for a local chevy dealer and had seen these cobalts and wanted one badly. I found one COMPLETELY STOCK and I drove about 150 miles to get it and on the way back home the check engine light came on. The dtc is a p0171 lean code. Since returning home, the following has been done: Replaced injectors and reprogrammed PCM per a TSB, replaced fuel filter, and replaced mass air flow sensor. The code is still there. The fuel pressure is good, there are no visable vaccume leaks (checked with break clean), O2 sensors are reading properly. Every tech in the shop has looked at this car, but I gave it another try today and now I have a P0101 MAF code too. It's also extremely sluggish in 2nd gear when floored. Boggs down badly. The car gets worse everyday and GM technical assistance says they dont know whats wrong with the car so Im hoping one of you guys can help. Once again COMPLETELY STOCK. Thanks for the help!

 

tried cleaning ur tb?

 

yep just did. Cleared the code, the lights not back on yet but the code is pending so it will probably be on in the morning when i go to work. I also made sure the intake tube was tight cuz there is a bulletin on that too. And fyi the oil dipstick seems to be completely seated, I hear thats another common problem that causes the lean code.

 

i have the same deal, i've been told it's the cold air intake i installed, my light comes up in the winter when it's cold...i've read somewhere on this board that bumping my car up to stage 2 will fix the problem

 

I have the same problem non stage 2 and everyone says its my cai I have an injen cai and they said until you get more air pumping out the back ie exhaust kit or stage 2 with a custom tune that is going to happen

 

pull your intake and inspect it for any holes in the tubing that will cause the code as well.