Intake Manifold 1 Temperature – Data Valid but Above Normal Operational Range – Moderately Severe Level
|Fault Code: 488
Intake Manifold 1 Temperature – Data Valid but Above Normal Operational Range – Moderately Severe Level. Intake manifold air temperature signal indicates intake manifold air temperature above engine protection warning limit.
Progressive power derate increasing in severity from time of alert.
Intake Manifold Air Temperature
The intake manifold air temperature sensor monitors intake manifold air temperature and passes information to the electronic control module (ECM)
through the engine harness. If the intake manifold air temperature becomes too high, it will cause a derate condition.
The intake manifold air temperature sensor is located in the air intake manifold. Refer to Procedure 100-002 for a detailed component location view.
The intake manifold air temperature sensor measures the temperature of the charge-air as it passes through the intake manifold. Possible causes of this fault code include:
- Plugged charge air cooler fins
- Restricted airflow through the charge air cooler
- Undersized charge air cooler
- High turbocharger compressor outlet temperature.