Advanced Diagnostics

Advanced Diagnostics - DTC P0097: Intake Air Temperature (IAT) Sensor 2 Circuit Low Voltage










General Description
The intake air temperature sensor is a thermistor that senses intake air temperature. Intake air temperature (IAT) sensor 2 is installed in the intake manifold and intake air temperature (IAT) sensor 1 is attached to the intake air duct. The sensor resistance varies depending on the air temperature sensed by its thermistor. As the intake air temperature falls, the sensor resistance increases, resulting in an increase of sensor output voltage. As the intake air temperature rises, the sensor resistance decreases, resulting in a decrease of sensor output voltage. If the IAT sensor 2 output voltage is excessively low, the powertrain control module (PCM) detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status






Enable Conditions






Malfunction Threshold
The IAT sensor 2 output voltage is 0.08 V or less for at least 2 seconds.

Diagnosis Details

Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.