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Home >> Mazda >> 2024 >> CX-90 Turbo Select >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> On-Board Diagnostic - Pcm (VIN C & VIN D) (1 Of 5) >> DTC P0101-00: MAF Sensor System: Function Malfunction (H3T)

DTC P0101-00: MAF Sensor System: Function Malfunction (H3T)

P0101:00 (PCM (H3T)) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location MAF sensor system: Function malfunction
Detection condition
  • The difference between the intake air amount measured by the MAF sensor and the estimated intake air amount estimated by the MAP sensor is outside of the specified value.
Fail-safe
  • Not applicable
Possible cause
  1. MAP sensor/IAT sensor No. 2 connector or terminal malfunction (See CONNECTOR INSPECTION .)
  2. MAF/IAT sensor No. 1 connector or terminal malfunction (See CONNECTOR INSPECTION .)
  3. MAP sensor/IAT sensor No. 2 incorrect installation (Refer to [MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO. 2 REMOVAL/INSTALLATION ] in Service Information).
  4. MAF sensor/IAT sensor No. 1 incorrect installation (Refer to [MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO. 1 REMOVAL/INSTALLATION ] in Service Information).
  5. PCM connector or terminal malfunction (See CONNECTOR INSPECTION .)
  6. MAP sensor malfunction (Refer to [MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION ] in Service Information).
  7. MAF sensor malfunction (Refer to [MASS AIR FLOW (MAF) SENSOR INSPECTION ] in Service Information).
  8. Air leakage from intake-air system
  9. Purge solenoid valve malfunction (Refer to [PURGE SOLENOID VALVE INSPECTION ] in Service Information).
  10. PCV valve malfunction (Refer to [POSITIVE CRANKCASE VENTILATION (PCV) VALVE INSPECTION ] in Service Information).
  11. A non-genuine air cleaner or air cleaner cover installed
  12. PCM malfunction (Refer to [PCM REMOVAL/INSTALLATION ] in Service Information).
Repeatability verification procedure
  1. Clear the DTC recorded in the memory. (See CLEARING DTC .)
  2. Start the engine.
  3. Access the following PCM PIDs using the M-MDS. (See PID/DATA MONITOR INSPECTION .)
    • ECT
    • TP1
    • TP2
    • ENG_RPM
  4. Warm up the engine until the engine coolant temperature is 70°C {158°F} or more.
  5. Perform the following:
    1. Depress the accelerator pedal to increase the engine speed to approx. 5, 000 rpm.
    2. Release the accelerator pedal to decrease the engine speed to idle speed.
    3. Repeat Step  1 and  2 operations above three times in succession.
System Wiring Diagram
  • Not applicable
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