Intake Manifold 1 Temperature – Data Valid but Above Normal Operational Range – Most Severe Level
|Fault Code: 155
Intake Manifold 1 Temperature – Data Valid but Above Normal Operational Range – Most Severe Level. Intake manifold air temperature signal indicates intake manifold air temperature above engine protection critical limit.
Marine: Calibration dependent.
Intake Manifold Air Temperature Sensor Circuit
The intake manifold air temperature sensor monitors intake manifold air temperature and passes information to the Electronic Control Module (ECM)
through the engine harness. No derate condition occurs for marine engines.
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:
- Restricted air flow through the charge air cooler
- Undersized charge air cooler
- High turbocharger compressor outlet temperature
- For marine engines verify the cooling water intake is not
blocked or clogged with debris.