Circuit/System Verification
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
- Engine idling at the normal operating temperature.
- If there is an abnormal engine noise, refer to Symptoms - Engine Mechanical .
- Verify that DTCs: DTC P0011, P0014, P0021, P0024, P0201-P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P0335, P0336, P0338, P2088, P2090, P2092, P2094, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, or P2316 are not set.
- If a DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Observe the Misfire Current Cyl. 1-6 parameters with a scan tool. The Misfire Current Counters should not be incrementing.
- Engine idling, perform the cylinder power balance test with a scan tool to isolate the misfiring cylinder. The engine speed should change when each injector is disabled.
- 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 are captured in the Freeze Frame/Failure Records Data List.