00_buck

I have trouble codes P0175 (rich bank 2), P0172 (rich bank 1), and P0153 (circuit condition O2 sensor bank 2). I went to autozone and they printed them out for me. On the Probable cause part for the P0172/175 codes it says if they are both going off then suspect a fuel pressure condition or MAF sensor fault. I know I don't have a fuel pressure condition but how would I know if my MAF is at fault without replacing it? I visually inspected the tube and it's brand new type of clean (it's only 3 years old). One thing to note, My K&N air filter was so filthy that it had sludge in the crevices (I'm cleaning it now). But I still don't think that could cause those 3 codes to go. I could have a bad O2 sensor but it wouldn't explain both banks being rich. One of my O2 sensors went bad last year and I replaced that one. Only the front O2 sensors are activated because I have no cats.

Any suggestions? if more info is needed let me know.

Kerns

Try cleaning your MAF and see if that helps at all... Could just be a bad MAF reading causing you to run rich.

WhiteFoxGT

+1

Ford has a big thing with K&Ns and 6.0s... they say the oil on the filter clogs the MAF element. I've also seen dead bugs on the MAF cause issues as well as other blockages.