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DTC Detection Logic

DTC DETECTION LOGIC CHART

DTC No. Trouble diagnosis (Trouble diagnosis content) DTC detecting condition Possible cause
P0111 IAT SENSOR 1 B1
[Intake air temperature (IAT) sensor circuit range/performance]
The comparison result of signals transmitted to ECM from each temperature sensor (IAT sensor, ECT sensor, and FTT sensor) shows that the voltage signal of the IAT sensor is higher/lower than that of other temperature sensors when the engine is started with its cold state.
  • Harness or connectors

    (High or low resistance in the IAT sensor circuit)

  • IAT sensor