Conditions for Clearing the DTC

WARNING: This page is about a different car, the 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

A current DTC Last Test Failed clears when the diagnostic runs and passes.
A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic.
Clear the DTC with a scan tool.

DTC P0864

Step	Action	Yes	No
1	Did you perform the Diagnostic System Check - Engine Controls?	Go to Step 2	Go to Diagnostic System Check - Engine Controls
2	Turn ON the ignition with the engine OFF. IMPORTANT: Record all Failure Records before clearing the DTC. Using Clear Info erases the Failure Records from the ECM and TCM. Record the DTC Freeze Frame/Failure Records. Did you record any TCM Freeze Frame/Failure Records?	Go to Diagnostic Trouble Code (DTC) List/Type in Automatic Transmission - 4T65-E	Go to Step 3
3	Clear the DTC Information with a scan tool. Turn the ignition OFF for at least 30 seconds. Start, and allow the engine to idle. Did DTC P0864 fail this ignition?	Go to Step 4	Go to Intermittent Conditions
4	Did any other TCM DTCs set?	Go to Diagnostic Trouble Code (DTC) List/Type in Automatic Transmission - 4T65-E	Go to Step 5
5	Replace the engine control module (ECM). Refer to Engine Control Module (ECM) Replacement . Did you complete the replacement?	Go to Step 6	-
6	Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition?	Go to Step 7	Go to Step 2
7	Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed?	Go to Diagnostic Trouble Code (DTC) List	System OK