Circuit Description

The IAT sensor is a thermistor built into the Mass Airflow (MAF) sensor. A thermistor is built into the sensor and senses intake air temperature. DTC is set when ECM detects an open or short circuit. ECM will operate in fail-safe mode if DTC P0110 is set. Possible causes are:

IAT sensor open or short circuit.
IAT sensor.
ECM.

NOTE: If DTCs P0110, P0115 and P0120 are output together, inspect ECM terminal E2 (ground) circuit. Repair as necessary. See appropriate wiring diagram in WIRING DIAGRAMS - 2.7L article.