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Home >> Nissan-Datsun >> 2008 >> Sentra Base, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - DTCS U1000 To P0171 (MR20DE) >> DTC P0101 MAF Sensor >> On Board Diagnosis Logic

On Board Diagnosis Logic

DTC DETECTING CONDITION CHART

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0101
0101
Mass air flow sensor circuit range/performance A) A high voltage from the sensor is sent to ECM under light load driving condition.
  • Harness or connectors

    (Mass air flow sensor circuit is open or shorted.)

  • Mass air flow sensor
  • EVAP control system pressure sensor
  • Intake air temperature sensor
B) A low voltage from the sensor is sent to ECM under heavy load driving condition.
  • Harness or connectors

    (Mass air flow sensor circuit is open or shorted.)

  • Intake air leaks
  • Mass air flow sensor
  • EVAP control system pressure sensor
  • Intake air temperature sensor