Diagnostic Aids

WARNING: This page is about a different car, the 2004 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

Fuel contamination, such as water and alcohol will effect fuel trim.
A malfunctioning mass air flow sensor can cause a rich condition and set this DTC. Refer to DTC P0101 .
Using scan tool, review Failure Records. If intermittent condition is suspected, refer to Intermittent Conditions .