DTC P0111 - IAT Sensor Circuit Performance: Notes

NOTE: For circuit reference, see the appropriate WIRING DIAGRAMS article. For connector and terminal identification, see CONNECTOR IDENTIFICATION .

The IAT sensor is a thermistor that varies resistance based on temperature. Low temperature will result in a high signal voltage. This test monitors IAT sensor voltage. If PCM detects a large change in sensor signal voltage in a .25 second period, DTC will set.