Ron C!

I have been getting a CEL lately if I get into traffic with a lot of idle time. Codes show a P0171 and P0174, lean both banks. Was planning on changing the Air Temp Sensor to fix that. Today I got a light while driving. Pulled the codes and it shows P0158 H C and P0171 C. Car is stock except for a K&N filter (probably needs cleaned, been a while), has almost 140K. Thoughts? I am thinking it may not be wasted money to change the O2 sensors as well as the Air Temp Sensor and clean the K&N.

TIA

Ron

v6turbo87

Doubtful that it is the air temp sensor or the O2 sensors--they would rarely go bad at the same time. I would look for vacuum leaks that are allowing unmetered air into the intake for the lean condition. Look for cracked vacuum lines.

Ron C!

Good idea. Will check everything this weekend.