Circuit Description

IAT sensor is a thermistor sensor that monitors temperature of air flowing into intake manifold. IAT sensor is located in air filter housing. DTC is set when ECM detects a open or short in IAT sensor 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 P0105, P0106, P0110, P0115 and P0120 are output together, inspect ECM terminal E2 (ground) circuit. Repair as necessary. See appropriate wiring diagram in WIRING DIAGRAMS - 2.2L article.