Circuit/System Verification

Verify that no other DTCs are set.
- If a DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
Engine idling, verify there is no abnormal engine noise.
- If there is an abnormal engine noise, refer to Symptoms - Engine Mechanical .
Observe the Misfire Current Counters with a scan tool. The Misfire Current Counters should not be incrementing. A random misfire, across one or more cylinders that are not steadily incrementing may be normal for this engine.
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.