Circuit/System Verification

IMPORTANT: Perform the Crankshaft Position System Variation Learn before proceeding with this diagnostic procedure.

Engine running at the normal operating temperature, verify there is no abnormal engine noise.
- If there is an abnormal engine noise, refer to Symptoms - Engine Mechanical .
Observe the DTC information with a scan tool. Verify that DTC P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0315, P0335, P0336, P0351, or P0352 is not set.
- If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .

IMPORTANT: A misfire may only occur when the engine is under a load. An engine load may be necessary to verify the condition.

Observe the scan tool Misfire Current Counter parameters. The Misfire Current Counters should not be incrementing.
Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.