p0171 p0174

[SandmanWs7]

I checked and they say o2 sensor lean bank 1 and 2. All I have done since is put a k&n filter in. Package said it was pre oiled so it wasnt me over oiling. Do I need to just take that filter off and clean MAF. Will electrical cleaner work or am I screwed and need a new MAF?

[Tman]

I would try to reset the codes and clean your MAF. This is some good stuff.

[camarojunky74]

+1, check for vacuum leaks and or exhaust leaks, since you just installed the filter and are getting this now i would look at the maf and or leak behind the maf to the throttle body, good luck and post what ya find