LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 1997 >> Venture LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Tests W/Codes >> Diagnostic Trouble Codes >> DTC P0103 - MAF Sensor Circuit High Frequency >> Diagnostic Procedures
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Procedures

  1. Perform ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK. See the BASIC TESTING article. After performing OBD system check, go to next step.
  2. Start engine and allow it to idle. Using scan tool, select ENG 1 data list. Monitor MAF FREQUENCY display. If frequency is less than 11,500 Hz, go to step 4). If frequency is not less than 11,500 Hz, go to next step.
  3. Turn ignition on, with engine off. Using scan tool, review FREEZE FRAME data and note parameters. Start engine and operate vehicle as close to conditions recorded in FREEZE FRAME as possible. Select SPECIFIC DTC function then enter DTC P0103. If scan tool indicates FAILED THIS IGN, go to next step. If scan tool does not indicate FAILED THIS IGN, see DIAGNOSTIC AIDS.
  4. Turn ignition off. Disconnect MAF sensor harness connector. Start engine. Using scan tool, monitor MAF FREQUENCY. If frequency is zero Hz, go to next step. If frequency is not zero Hz, go to step 7).
  5. Check for poor connection at MAF sensor connector. Repair as necessary. After repairs, go to step 10). If connector is okay, go to next step.
  6. Replace MAF sensor. After replacing sensor, go to step 10).
  7. Check for incorrect routing of MAF sensor wiring harness. Ensure harness is not near ignition coils or other high-voltage components. Reroute wiring harness as necessary. After repairs, go to step 10). If wiring harness is routed correctly, go to next step.
  8. Check MAF signal circuit terminal connections at PCM. Repair as necessary. After repairs, go to step 10). If terminal connections are okay, go to next step.
  9. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to next step.
  10. Using scan tool, select CLEAR INFO or CLEAR DTCS function to clear DTCs. Turn ignition on, with engine off. Using scan tool, review FREEZE FRAME data and note parameters. Start engine and operate vehicle as close to conditions recorded in FREEZE FRAME as possible. Monitor SPECIFIC DTC info for DTC P0103. If scan tool indicates FAILED THIS IGN, repeat step 2). If scan tool does not indicate FAILED THIS IGN, repair is complete.
scientia non olet · About LEMON Manuals