Conditions for Clearing the MIL/DTC

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
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 emission related diagnostic.
Clear the MIL and the DTC with a scan tool.

DTC P0802

Step	Action	Values	Yes	No
Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Control Module (ECM) Connector End Views or Engine Controls Connector End Views
1	Did you perform the Diagnostic System Check-Engine Controls?	-	Go to Step 2	Go to Diagnostic System Check - Engine Controls
2	Connect a scan tool. Did DTC P0802 fail this ignition?	-	Go to Step 4	Go to Step 3
3	Observe the Freeze Frame/Failure Records data for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text or as close to the Freeze Frame/Failure Records data that you observed. Does the DTC fail this ignition?	-	Go to Step 4	Go to Intermittent Conditions
4	Turn OFF the ignition. Disconnect the TCM. Refer to Transmission Control Module (TCM) Replacement in Automatic Transmission-Allison. Connect a DMM from the TCM MIL request circuit at the TCM harness connector to a good ground. Turn ON the ignition, with the engine OFF. Does the voltage measure near the specified value?	B +	Go to Step 5	Go to Step 6
5	Test the TCM MIL request circuit for a short to voltage and repair as necessary. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct a condition?	-	Go to Step 12	Go to Step 7
6	Test the TCM MIL request circuit for an open and repair as necessary. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct a condition?	-	Go to Step 12	Go to Step 7
7	Leave the TCM disconnected. Connect a fused jumper wire from the TCM MIL request circuit in the TCM harness connector to a good ground. Clear the DTCs with a scan tool. Does DTC P0700 set, but not DTC P0802?	-	Go to Step 8	Go to Step 10
8	Perform the following procedures: Check the battery and powers and grounds of the TCM for high resistance or corrosion. Refer to Circuit Testing and Connector Repairs in Wiring Systems. Test the TCM connectors for a poor connection. Refer to Circuit Testing and Connector Repairs in Wiring Systems. Did you find and correct a condition?	-	Go to Step 12	Go to Step 9
9	Replace the TCM. Refer to Transmission Control Module (TCM) Replacement in Automatic Transmission - Allison. Did you complete the action?	-	Go to Step 12	-
10	Test the ECM connectors for a poor connection. Refer to Circuit Testing and Connector Repairs in Wiring Systems. Did you find and correct a condition?	-	Go to Step 12	Go to Step 11
11	Replace the ECM. Refer to Engine Control Module (ECM) Replacement . Did you complete the replacement?	-	Go to Step 12	-
12	Use a scan tool to clear the DTCs. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC run and pass?	-	Go to Step 13	Go to Step 2
13	With a scan tool, observe the stored information, Capture Info. Does the scan tool display any DTCs that you have not diagnosed?	-	Go to Diagnostic Trouble Code (DTC) List	System OK