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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 26 (Engine Controls Self-Diagnostics - 5.0L & 5.7L) >> Diagnostic Tests >> DTC P0103: MAF Sensor Circuit - High Frequency >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2001 GMC Savana, 2001 Chevrolet RV Cutaway, 2001 Chevrolet Cutaway, and 2001 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform powertrain diagnostic system check. See POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing powertrain diagnostic system check, go to next step.
  2. Observe FREEZE FRAME/FAILURE RECORDS data for this DTC. Turn ignition off for 30 seconds. Start engine. Operate vehicle within code enable criteria or as close to FREEZE FRAME/FAILURE RECORDS data as possible. If DTC failed this ignition cycle, go to next step. If DTC did not fail this ignition cycle, see DIAGNOSTIC AIDS .
  3. Turn ignition off. Disconnect MAF sensor connector. MAF sensor is located at air cleaner. Start engine. Using scan tool, observe MAF sensor frequency parameter. If scan tool displays zero hertz, go to step  5. If scan tool does not display zero hertz, go to next step.
  4. Check MAF sensor harness for incorrect routing at secondary ignition wires, coils, solenoids, relays and motors. If problem was found, repair as necessary. After repairs, go to step  9. If problem was not found, go to step  6.
  5. Check MAF sensor connector for poor connections. If problem was found, repair as necessary. After repairs, go to step  9. If problem was not found, go to step  7.
  6. Check PCM connectors for poor connections. If problem was found, repair as necessary. After repairs, go to step  9. If problem was not found, go to step  8.
  7. Replace MAF sensor. After repairs, go to step  9.
  8. Replace PCM. Program PCM. See POWERTRAIN CONTROL MODULE  under PROGRAMMING. After repairs, go to next step.
  9. Using scan tool, clear DTCs. Turn ignition off for 30 seconds. Start engine. Operate vehicle within code enable criteria. If DTC runs and passes, go to next step. If DTC does not run and pass, go to step  2.
  10. Using scan tool, observe stored information. If scan tool displays any DTCs that have not been diagnosed, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If scan tool does not display any DTCs, system is okay.
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