Hi All.
This is the next chapter of the saga with my '98 V6 AT Contour that started with an
earler post of mine .
I have now replaced:
- both pre-cat O2 sensors
- the fuel filter
I've inspected and found no problems with:
- EGR valve
- extra air pipes that feed Bank 1 (the rear)
- throttle body
- AFM sensor
I also ran a can of Chevron FI cleaner through it. Yet I still get these two codes:
- P0171: System Too Lean (Bank 1)
- P1131: Lack of HO2S11 Switches - Sensor Indicates Lean
So I was wondering if anyone can tell me what I logically should go after next, and how I should go about doing it. How would Pepper's OBD-II software make my diagnostic life easier? I'd definitely rather spend the money on tools than at the dealer ...
At this point, it seems to me that I've pretty much done everything but
- replace PCV
- replace spark plugs
- inspect / replace injectors
What have I overlooked that could be causing this very-Bank-1-specific problem? Thanks in advance for any help and/or insight you can lend me ...
Regards,
