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Home >> Mazda >> 2017 >> CX-9 Signature >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> On-Board Diagnostic - Engine Control System (1 Of 5) >> DTC P0101-00; MAF Sensor Circuit Range/Performance Problem >> Notes
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DTC P0101-00; MAF Sensor Circuit Range/Performance Problem: Notes

DETECTION CONDITION AND POSSIBLE CAUSE

DTC P0101:00 MAF sensor circuit range/performance problem
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.

    Diagnostic support note

  • This is a continuous monitor (CCM).
  • The check engine light illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
  • PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle.
  • FREEZE FRAME DATA/Snapshot data is available.
  • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION
  • Not applicable
POSSIBLE CAUSE
  • MAP sensor/IAT sensor No. 2 connector or terminals malfunction
  • MAF sensor/IAT sensor No. 1 connector or terminals malfunction
  • MAP sensor/IAT sensor No. 2 loose
  • MAF sensor/IAT sensor No. 1 loose
  • PCM connector or terminals malfunction
  • MAP sensor malfunction
  • MAF sensor malfunction
  • Air leakage from intake-air system
  • Purge solenoid valve malfunction
  • PCV valve malfunction
  • PCM malfunction
SYSTEM WIRING DIAGRAM
  • Not applicable
CAUTION:
  • Verify the malfunction symptom according to not only the PID value but also the symptom troubleshooting.

Related PIDs

Item (definition) Unit/Condition Definition Condition/Specification (Reference)
ECT °C, °F Engine coolant temperature input from ECT sensor No. 1
  • Displays ECT
V ECT sensor No. 1 voltage Ignition switched ON (engine off)
  • ECT is 29 °C {84 °F}: Approx. 2.65 V

    Idle (after warm up)

  • ECT is 88 °C {190 °F}: Approx. 0.71 V
MAF g/Sec Mass air flow input from MAF sensor
  • Displays MAF
V MAF sensor voltage
  • Ignition switched ON (engine off) (MAF: 0.59 g/s {0.078 lb/min}): Approx. 0.72 V
  • Idle (after warm up) (MAF: 2.17 g/s {0.287 lb/min}): Approx. 0.97 V
  • Racing (engine speed is 2, 000 rpm) (MAF: 4.73 g/s {0.626 lb/min}): Approx. 1.26 V
MAP KPa {MPA}, mBar {BAR}, psi, in H20 Manifold absolute pressure input from MAP sensor
  • Displays MAP
MAP_V V MAP sensor voltage
  • Ignition switched ON (engine off) (MAP:101 kPa {1.03 kgf/cm2 , 14.6 psi}): Approx. 4.12 V
  • Idle (after warm up) (MAP: 33 kPa {0.34 kgf/cm2 , 4.8 psi}): Approx. 1.9 V
  • Racing (engine speed is 2, 000 rpm) (MAP: 26 kPa {0.27 kgf/cm2 , 3.8 psi}): Approx. 1.23 V
RPM RPM Engine speed
  • Displays engine speed
TP_REL % Throttle valve opening angle (relative value) with value at throttle valve fully close timing as the start point
  • Accelerator pedal released: Approx. 12%
  • Accelerator pedal fully depressed: Approx. 82%
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