Intake Air Temperature Sensor

Intake Air Temperature (IAT) sensor is a thermistor whose resistance decreases as intake air temperature increases. ECM uses IAT sensor to control fuel delivery. When air temperature is cold, ECM enriches fuel mixture by increasing injector pulse width. ECM will decrease injector pulse width when air temperature is warm. On Optima & Magentis (Canadian) (2.7L) and Rio, IAT sensor is located in intake plenum. On Optima & Magentis (Canadian) (2.4L), IAT sensor is a component of Mass Airflow (MAF) sensor located on air intake hose near air cleaner housing. On Spectra, IAT sensor is located in air cleaner housing. On Sorento, IAT sensor is located in the intake air hose.