Advanced Diagnostics
Advanced DiagnosticsDTC P0112: Intake Air Temperature (IAT) Sensor 1 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's 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 1 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 1 output voltage is 0.08 V or less for at least 2 seconds.
Diagnosis Details
Conditions for illuminating the MIL
When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the PCM memory.
Conditions for clearing the MIL
The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.
The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.