The Engine Control Module (ECM) has detected a performance fault with the Intake Air Temperature (IAT) sensor.
- Engine Light ON (or Service Engine Soon Warning Light)
The Intake Air Temperature (IAT) sensor contains a semiconductor device which changes the resistance based on the temperature (a thermistor). The IAT sensor is located in the air intake passage of the engine air induction system. The IAT sensor has a signal circuit and a ground circuit.
Upgraded version of the well-known ALL-300 series leak...
Leslie