Diagnostic Aids
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- Fuel contamination, such as water or alcohol, will effect fuel trim.
- A malfunctioning MAF sensor can cause a rich condition and set this DTC. See DTC P0101: MASS AIR FLOW SENSOR PERFORMANCE .
- Using a scan tool, review the Failure Records. If an intermittent condition is suspected, see INTERMITTENT CONDITIONS under SELF-DIAGNOSTIC SYSTEM.