Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM.

The intake manifold 1 temperature sensor measures the temperature of the charge-air as it passes through the intake manifold. Possible causes of this fault code include:

1)Plugged charge air cooler fins
2)Restricted airflow through the charge air cooler
3)An undersized charge air cooler
4)High turbocharger compressor outlet temperature.

Possible repairs:

1)Replace the intake manifold temperature sensor.