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 P0045

Step	Action	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	Are DTCs P0652, P0653, P2564, or P2565 also set?	Go to Diagnostic Trouble Code (DTC) List	Go to Step 3
3	Start the engine. Select the TC vane position control solenoid test in Scan Tool Output Controls. Raise the engine RPM to 2,000 RPM and maintain. Command the turbocharger (TC) vane position control solenoid valve to ON and back OFF with a scan tool. Does the engine speed change when the valve is commanded ON?	Go to Step 4	Go to Step 5
4	Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 30 seconds. Turn ON the ignition, with the engine OFF. 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 5	Go to Intermittent Conditions
5	Turn OFF the ignition for 30 seconds. Disconnect the TC vane position control solenoid valve. Connect a J 34730-405 Injector Test Lamp between the high control circuit of the solenoid valve and the low reference circuit of the solenoid valve. Turn ON the ignition, with the engine OFF. Select the TC Vane Pos. Ctrl. Solenoid test in scan tool output controls. Command the TC Vane Pos. Ctrl. Solenoid to OFF. Does the test lamp illuminate?	Go to Step 10	Go to Step 6
6	Command the TC Vane Pos. Ctrl. Solenoid to ON with a scan tool. Does the test lamp illuminate?	Go to Step 8	Go to Step 7
7	Turn OFF the ignition for 30 seconds. Connect a J 34730-405 between the high control circuit of the solenoid valve and to a good ground. Turn ON the ignition, with the engine OFF. Command the TC Vane Pos. Ctrl. solenoid valve to ON with the scan tool. Does the test lamp illuminate?	Go to Step 11	Go to Step 9
8	Turn OFF the ignition. Ensure the engine control module (ECM) has powered down. Connect a J 34730-405 between the low reference circuit of the solenoid valve and to battery voltage with a fused jumper wire. Ensure that the ignition is OFF. Does the test lamp illuminate?	Go to Step 12	Go to Step 13
9	Test the control circuit of the solenoid valve for the following conditions: An open A short to ground High resistance Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 20	Go to Step 16
10	IMPORTANT: Disconnecting the ECM may eliminate the short during testing. Test the control circuit of the solenoid valve for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.Did you find and correct the condition?	Go to Step 20	Go to Step 16
11	Test the low reference circuit of the solenoid valve for an open, high resistance, or a short to voltage. Refer to Circuit Testing andWiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 20	Go to Step 16
12	Test the low reference circuit of the solenoid valve for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 20	Go to Step 16
13	Disconnect the TC vane position sensor. Test the signal circuit of the position sensor for a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 20	Go to Step 14
14	Test the control circuit and the low reference circuit of the TC vane position control solenoid valve for high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 20	Go to Step 15
15	Test for an intermittent and for a poor connection at the vane control solenoid valve. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 20	Go to Step 17
16	Test for an intermittent and for a poor connection at the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 20	Go to Step 19
17	Inspect the TC for debris, damage, or stuck. Refer to Turbocharger Cleaning and Inspection in Engine Mechanical. If required, replace the TC. Refer to Turbocharger Replacement in Engine Mechanical. Did you find and correct the condition?	Go to Step 20	Go to Step 18
18	Replace the TC vane control solenoid valve. Refer to Turbocharger Vane Position Control Solenoid Valve Replacement . Did you complete the replacement?	Go to Step 20	-
19	Replace the ECM. Refer to Engine Control Module (ECM) Replacement . Did you complete the replacement?	Go to Step 20	-
20	Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Perform the turbocharger learn procedure. Refer to Turbocharger Learn Procedure . 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 2	Go to Step 21
21	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