IAT Sensor

Scan Tool Range -40°C to 151°C (-40°F to 304°F). The PCM converts the resistance of the intake air temperature sensor to degrees. The PCM uses intake air temperature (IAT) to adjust the fuel delivery and the spark timing according to incoming air density. The IAT is also compared to The ECT at start-up in order to identify cold starts for the HO2S heater and the [1][2]EVAP diagnostics.