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.
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SERVICE MANUAL 3000 AND 4000 SERIES GEN 4 GENERATION – ALLISON
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