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Home >> Chevrolet >> 2000 >> Prizm LSi, 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 On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD system check, go to next step.
  2. Using scan tool, check for any other DTCs. Repair affected DTC(s) first. If no other DTC(s) 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 in MAF sensor circuits. Check for high resistance in MAF sensor circuits. Ensure there is at least 11 volts on ignition positive voltage circuit. 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. After repairs, using scan tool, clear DTC information. Road test vehicle within freeze frame conditions that set DTC. Check for DTCs. If no DTCs are stored, repair is complete. If any DTCs are stored, diagnose affected DTC(s).
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