Circuit/System Verification
WARNING: This page is about a different car, the 2008 GMC Sierra and 2008 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Verify that no other DTCs are set.
- If a DTCs is 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. 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 are captured in the Freeze Frame/Failure Records List.