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Home >> Chevrolet >> 2001 >> Prizm Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 1.8L >> Diagnostic Tests >> DTC P0101: MAF Sensor Performance >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform powertrain diagnostic system check. See POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing diagnostic system check, go to next step.
  2. Using scan tool, check for any other DTCs. Repair affected DTCs first. If no other DTCs are set, go to next step.
  3. Check for objects blocking MAF sensor inlet, intake manifold vacuum leaks, throttle body vacuum leaks or EGR valve leaks. Check for faulty, missing or incorrectly installed PCV valve. Repair as necessary. After repairs, go to step  7. If no problem is found, go to next step.
  4. Turn ignition on, with engine off. Using scan tool, place control module into Check Mode. Operate vehicle within FREEZE FRAME conditions. Check DTCs. If this DTC resets, go to next step. If this DTC does not reset, see DIAGNOSTIC AIDS .
  5. Check for poor connections or high resistance in MAF sensor circuits. Ensure there is at least 11 volts on MAF sensor harness connector terminal No. 1 (Black wire). See Figure. Repair as necessary. After repairs, go to step  7. If connections and circuits are okay, go to next step.
  6. Replace MAF sensor. After replacing sensor, go to next step.
  7. Turn ignition on, with engine off. Using scan tool, clear DTCs. Road test vehicle within conditions for running DTC. See CODE ENABLE CRITERIA . Check for DTCs. If no DTCs are stored, repair is complete. If any DTCs are stored, diagnose affected DTCs.
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