Circuit/System Verification
- Engine idling at the normal operating temperature. Verify there is no abnormal engine noise.
- If there is an abnormal engine noise, refer to Symptoms - Engine Mechanical .
- Verify that DTCs P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0315, P0335, P0336, P0351, or P0352 are not set.
- If a DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Observe the Misfire Current Counters with a scan tool. The Misfire Current Counters should not be incrementing.
- If the vehicle passes the Circuit/System Verification test, then 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.
IMPORTANT:
Perform the Crankshaft Position System Variation Learn
before proceeding with this diagnostic procedure.
IMPORTANT:
A misfire may only occur when the engine is under a load. An engine load may be necessary to verify the condition.