Cummins ISB CM850 (2003-06) Fault Code: 488 PID: 105 SPN: 105 FMI: 0 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.
Cummins ISB CM850 (2003-06) Fault Code: 488 PID: 105 SPN: 105 FMI: 0 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.
The intake manifold air temperature sensor measures the temperature of the charge-air as it passes through the intake manifold.
Possible causes:
1)Plugged charge air cooler fins
2)Restricted airflow through the charge air cooler
3)Undersized charge air cooler
4)High turbocharger compressor outlet temperature.
Possible repairs:
1)Replace the intake manifold air temperature sensor.
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