Oxygen senson replaced but still have problems
I get the codes...P0171 and P0174 Pnd Mod10 System Too Lean.
I replaced the oxygen sensors (2 upstream 2 downstream) with Bosch parts and codes came back.
My next plan of attack will be
Mass Air Flow Sensor.
Am I on the track? PLEASE HELP
Last edited by Jim6869; Apr 23, 2017 at 09:50 AM.
Reason: more detail