P0113

DTC P0113 Intake Air Temperature (IAT) Sensor Circuit High Voltage






Circuit Description

The intake air temperature sensor is a thermistor that controls signal voltage to the PCM. When the air is cold, the sensor resistance is high, therefore the PCM Will see a high signal voltage. As air warms, sensor resistance becomes less and voltage drops. This is a type B DTC.

Conditions for Setting the DTC

^ Engine operating for 8 minutes.
^ IAT less than or equal to -30°C (-22°F).
^ Conditions met for 2 seconds.

Action Taken When the DTC Sets

Possible poor performance during cold weather operation.

Conditions for Clearing the MIL/DTC

^ The PCM will turn the MIL off after three consecutive trips without a fault condition.
^ A History DTC will clear when forty consecutive warm-up cycles that the diagnostic does not fail (Coolant temperature has risen 5°C(40°F) from start up coolant temperature and engine coolant temperature exceeds 16O°F (71°C) that same ignition cycle).
^ Use of a scan tool.

Diagnostic Aids

The scan tool displays intake air temperature in degrees centigrade. Refer to "Intermittent" on page 13. A "skewed" sensor could result in poor driveability complaints.

Test Description

Number(s) below refer to the step number(s) on the diagnostic Table.

5. This step determines if P0113 is a hard failure or an intermittent condition.

6. This step will determine if there is a wiring problem or a faulty PCM.