I have an 06 cobalt ss that i purchased certified used and is stock to my knowledge. Can't get rid of too lean code. Have owned the car for 10 months now with it being at chevy for a total of 6 months (had the car for a total of 2 days in the past 4 months). Have had injectors, injector harness, maf sensor, o2 sensors, airbox, cat, down pipe, intake gasket and computer replaced that i know of. Dealership has no idea what else to replace and I wanted to know if anyone knows anything else that could contribute to this problem in the hopes of getting my car back and passing an emissions test that is due within a couple of weeks.

 

Adding that it is the 2.0 s/c.

 

Your allowed to throw 1 or 2 codes and pass emissions

 

Not in my state.

Check to see that your intercooler pump is working and that there's fluid in the system. When mine wasn't working, I had a lean code keep popping up that I could not for the life of me figure out what was causing it. Must've been the insanely high EGT's and IAT2's because it always came on under light throttle after I'd been cruising or sitting in traffic for a bit.

Once I fixed that, the code went away and hasn't come back since.

 

I live in illinois and I am almost positive you cant have any codes on to pass emissions.

 

Thanks Chris. I will talk to the dealer and tell them to look at that. It is pretty sad when one dealership gave up and told me they would not work on my car anymore and now it is about to happen again with a different dealership.

 

Figured out the problem. Chevy put the wrong injectors in the car. Put in stock injectors instead of my stage 1 injectors.

 

i have a 06, 2.4, ss and i just put a CAI on it and it gave me this code po171,,, but i took the CAI back off and the light went off, what do i have to do to keep the CAI on without throwing the code again ,,,