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.
- Ignition ON, record the DTC Freeze Frame/Failure Records.
- If any TCM Freeze Frame/Failure Records are recorded refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Clear the DTC information with a scan tool.
- Ignition OFF for at least 30 seconds.
- Engine idling for 1 minute. DTC P0864 should not set.
- If DTC P0864 sets and no TCM DTCs are present, replace the ECM.
- If DTC P0864 and TCM DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
IMPORTANT:
Record all Failure Records before clearing the DTC. Using Clear Info erases the Failure Records from the engine control module (ECM) and transmission control module (TCM).