FixVault

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 (The 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 (The sensor circuit is open or shorted.)
  • Intake air leakage
  • Mass air flow sensor
  • EVAP control system pressure sensor
  • Intake air temperature sensor