FixVault

DTC Detection Logic

DTC DETECTING CONDITION 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