Quote:
Originally Posted by delise
Could the sensor that measures the gas tank/neck pressure to determine the gas cap is on correctly be faulty? I don't see that it has been replaced or checked, also could a short be occurring in the sensor wiring ? Also I notice you have a full tank of gas in the pict above, have you noted if the warning comes on randomly or only when your tank is full/empty etc.
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I am getting P0420 so they feel that it is not related to the gas cap. We did replace O2 sensors though...