CHIWS6

iTrader: (31)

could it be a problem with the o2 sensors or the maf, any help would be great, the car is stock

brad8266

iTrader: (23)

could be 02 sensors although with both banks lean I would think something else. Make sure you are getting proper fuel pressure at the rails first, you may just need a new fuel filter or something of that nature.

rkinney

I know on trucks and suv's. bank 1 lean p0171 and bank 2 lean p0174 can be set due to the intake gaskets not sealing and sucking air. I do not believe this is a problem in the vettes or camaros as the intake gaskets are of different design. I have seen it a bunch in the trucks and suv's. There is a revised gasket with green a gasket around the ports instead of the older design with orange. With a scan tool you can monitor fuel trims and spray some carb cleaner around the intake, and if the gasket is leaking fuel trims will go negative.

brad8266

iTrader: (23)

yeah, a leak anywhere behind the MAF can cause this, listen for a hissing sound around the intake area. If you havent taken anything off the engine though there is no reason for there to be a leak.

muncie21

iTrader: (14)

Any air not going through the MAF will impact AFRs.

04JRB

when this happened to me, the dealer scanned it and got the codes but couldnt tell me what was wrong. In my case the CAI pipe at the throttle body was not tight enough to make a seal. tightened up the clamps and the SES light went away. I hope its something simple like that to fix your issue.