Circuit/System Verification

WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

There should be no abnormal engine noise.
Diagnose any other DTCs that are set. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
Observe the Misfire Current Counters with a scan tool.
Operate the engine within the conditions listed in the Freeze Frame Failure Records.
The engine should not be misfiring.