Circuit/System Verification

Verify that no other DTCs are set.
- If any other DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
Engine idling, verify there is no abnormal engine noise.
- If there is 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. Random misfires that are not steadily incrementing may be normal.
If the vehicle passes the Circuit/System Verification test, operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records List.
Engine running, observe the DTC information with a scan tool. DTCs P0300-P0308 should not set.
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.