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 P0103

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	Start the engine. Observe the MAF Sensor parameter with a scan tool. Is the MAF Sensor parameter more than the specified value?	4.5 V	Go to Step 4	Go to Step 3
3	Observe the Freeze Frame/Failure Records for this DTC. 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 4	Go to Inducing Intermittent Fault Conditions in Wiring Systems and Intermittent Conditions
4	Allow the engine to idle. Observe the MAF Sensor parameter with a scan tool. Move the harness and the connector of the mass air flow (MAF)/intake air temperature (IAT) sensor. Does the movement of the harness or the connector affect the MAF Sensor parameter?	-	Go to Step 14	Go to Step 5
5	Observe the MAF Sensor parameter with a scan tool. Disconnect the MAF sensor. Is the MAF Sensor parameter more than the specified value?	4.5 V	Go to Step 9	Go to Step 6
6	Turn OFF the ignition. Inspection the air induction system for any water intrusion. Did you find and correct the condition?	-	Go to Step 17	Go to Step 7
7	IMPORTANT: All electrical components and accessories must be turned OFF. Turn OFF the ignition for 60 seconds to allow the control modules to power down before proceeding. Measure the resistance from the low reference circuit of the MAF sensor to a good ground with a DMM. Refer to Circuit Testing in Wiring Systems. Is the resistance less than the specified value?	5 ohm	Go to Step 11	Go to Step 8
8	Disconnect the engine control module (ECM). Test the low reference circuit between the ECM and the MAF sensor for a high resistance or an open. Refer to Circuit Testing in Wiring Systems. Did you find and correct the condition?	-	Go to Step 17	Go to Step 12
9	IMPORTANT: Disconnecting the harness connectors of the ECM may eliminate the short to voltage if the signal circuit is shorted to another ECM circuit. Turn OFF the ignition. Disconnect the harness connectors of the ECM. Test the MAF sensor signal circuit for the following conditions: A short to voltage A short to any 5-volt reference circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 17	Go to Step 10
10	Measure the resistance from the signal circuit of the MAF sensor to all other circuits at all ECM connectors with a DMM. Refer to Circuit Testing in Wiring Systems. Is the resistance less than the specified value?	infinity ohm	Go to Step 13	Go to Step 12
11	Test for an intermittent and for a poor connection at the MAF/IAT sensor. Refer to Testing for Intermittent Conditions and Poor Connections andConnector Repairs and Repairing Connector Terminals in Wiring Systems. Did you find and correct the condition?	-	Go to Step 17	Go to Step 15
12	Test for an intermittent and for a poor connection at the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs and Repairing Connector Terminals in Wiring Systems. Did you find and correct the condition?	-	Go to Step 17	Go to Step 16
13	Repair the circuits that are shorted together. Refer to Wiring Repairs in Wiring Systems Did you complete the repair?	-	Go to Step 17	-
14	Repair the harness or the connections as necessary. Refer to Wiring Repairs and Connector Repairs andRepairing Connector Terminals in Wiring Systems. Did you complete the repair?	-	Go to Step 17	-
15	Replace the MAF/IAT sensor. Refer to Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor Replacement . Did you complete the replacement?	-	Go to Step 17	-
16	Replace the ECM. Refer to Engine Control Module (ECM) Replacement . Did you complete the replacement?	-	Go to Step 17	-
17	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 2	Go to Step 18
18	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