I had been getting a P0171 code and I cleaned the mass air flow sensor.
This seemed to solve the P0171 problem and it also stopped the valves from pinging.
Car ran great for two days and still seems to be running fine but the check engine light is coming back on now and my scan tool is giving me these 3 codes: P640-QDM 1 FAULT, P650-QDM 2 FAULT, and P670-QDM 4 FAULT.
Can you please help me with this?
have the same problem?
Wednesday, April 25th, 2012 AT 12:49 AM