Detroit DD15 GHG14 (2014-16) Fault Code: SPN 677 FMI 14 (MCM, CPC) Electronic Starter Fault or Motor Control Module Internal Failure

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

NOTE: If active and engine starts, re-start the engine 3 times. If fault doesn’t come back, clear the codes and return vehicle.

NOTE: If active, the failure is probably a failed MCM (Engine ECM).