This code indicates that the Powertrain Control Module (PCM) has detected an intermittent problem with the intake air temperature (IAT) sensor 2 circuit. The IAT sensor is responsible for measuring the temperature of the air entering the engine, and this information is used by the PCM to calculate the air/fuel mixture. An intermittent problem with the IAT sensor circuit could cause the engine to run rich or lean, which could lead to poor performance, increased emissions, and/or engine damage.
Possible causes:
- Faulty IAT sensor
- Damaged or loose wiring
- Poor connection at the IAT sensor or PCM
- Faulty PCM
Diagnosis:
To diagnose this code, the first step is to inspect the IAT sensor and its wiring for damage. If no damage is found, the next step is to test the IAT sensor using a multimeter. The resistance of the IAT sensor should change as the temperature changes. If the resistance does not change, the sensor is faulty and should be replaced.
If the IAT sensor is not faulty, the next step is to check the wiring and connections for the IAT sensor. Make sure that the wires are not damaged and that the connections are tight. If the wiring and connections are good, the next step is to test the PCM. This can be done using a scan tool or by checking the PCM for any signs of damage.
Repair:
The repair for this code will depend on the cause of the problem. If the IAT sensor is faulty, it should be replaced. If the wiring or connections are damaged, they should be repaired. If the PCM is faulty, it will need to be replaced.
