Detroit DD15 GHG14 (2014-16) Fault Code: SPN 5444 FMI 1 (MCM) Engine Crankcase Breather Oil Separator Speed Too Low

NOTE: Please see the step by step troubleshooting procedures for this specific code.

PROBABLE CAUSES:
1. Oil leak at the crankcase oil seperator vent.
2. Crankcase breather speed sensor connector/harness.
3. Crankcase breather speed sensor.