P0099 Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic
Possible causes
– Faulty Intake Air Temperature sensor
– Intake Air Temperature sensor harness is open or shorted
– Intake Air Temperature sensor circuit poor electrical connection
– Intake Air Temperature sensor harness is open or shorted
– Intake Air Temperature sensor circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P0099 Description
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.