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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 254 (Engine Controls Self-Diagnostics) >> Diagnostic Tests >> DTC P0103: MAF Sensor Circuit - High Frequency >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
  1. Did you perform the Diagnostic System Check-Engine Controls? If yes, go to next step. If no, see DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM.
  2. 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. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition cycle? If yes, go to next step. If no, see DIAGNOSTIC AIDS .
  3. Turn ignition OFF. Disconnect the MAF sensor harness connector. Start the engine. Observe MAF sensor frequency with a scan tool. Is MAF sensor frequency more than 0 Hz? If yes, go to next step. If no, go to step  5.
  4. Turn ignition OFF. Inspect the harness of the MAF sensor for incorrect routing that is too close to the following components:
    • Any aftermarket accessories.
    • The secondary ignition wires or the coils.
    • Any solenoids.
    • Any relays.
    • Any motors.

    Did you find and correct the condition? If yes, go to step  10. If no, go to step  7.

  5. Turn ignition OFF. Inspect the following systems for any water intrusion.
    • The air induction system.
    • The secondary Air Injection System (AIR).

    Did you find and correct the condition? If yes, go to step  10. If no, go to next step.

  6. Test for an intermittent and/or poor connections at the MAF sensor. Did you find and correct the condition? If yes, go to step  10. If no, go to step  8.
  7. Test for an intermittent and/or connections at the PCM. Did you find and correct the condition? If yes, go to step  10. If no, go to step  9.
  8. Replace MAF sensor. See MASS AIRFLOW SENSOR under SENSORS in REMOVAL & INSTALLATION - CORVETTE article. Did you complete the replacement? If yes, go to step  10.
  9. Replace PCM. See POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in REMOVAL & INSTALLATION - CORVETTE article. Did you complete the replacement? If yes, go to next step.
  10. 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 cycle? If yes, go to step  2. If no, go to next step.
  11. Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
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