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DTC Detection Logic

DTC DETECTION LOGIC CHART

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0101 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 (The sensor circuit is open or shorted.)
  • Mass air flow sensor
  • EVAP control system pressure sensor
B) A low voltage from the sensor is sent to ECM under heavy load driving condition.
  • Harness or connectors (The sensor circuit is open or shorted.)
  • Intake air leakage
  • Mass air flow sensor
  • EVAP control system pressure sensor
  • Intake air temperature sensor