Cummins ISB6.7 CM2150 (2007-09) Fault Code: 1974 PID: 101 SPN: 101 FMI: 0 Crankcase Pressure – Data Valid but Above Normal Operational Range – Least Severe Level. The crankcase breather filter requires maintenance.

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.

Possible causes:

1)Crankcase breather filter needs to be replaced.

Possible repairs:

1)Replace the crankcase breather filter.