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Detroit DD16 GHG14 (2014-16) Fault Code: SPN 655 FMI 7 (MCM) Injector Cylinder #5 Needle Control Valve Stuck Open

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

NOTE: If code 168-xx or 723-xx present, fix those first.

PROBABLE CAUSES:
1. Front fuel injector harness connection (14-pins).
2. Injector harness.
3. Failed injector.
4. Engine side harness failure.
5. MCM (Engine ECM) failure.

Detroit DD16 GHG14 (2014-16) Fault Code: SPN 655 FMI 6 (MCM) Injector Cylinder #5 Needle Control Valve Shorted Circuit
Detroit DD16 GHG14 (2014-16) Fault Code: SPN 655 FMI 5 (MCM) Injector Cylinder #5 Needle Control Valve Circuit Open
Detroit DD16 GHG14 (2014-16) Fault Code: SPN 655 FMI 4 (MCM) Injector Cylinder #5 Needle Control Valve Abnormal Operation (MIN)
Detroit DD16 GHG14 (2014-16) Fault Code: SPN 655 FMI 3 (MCM) Injector Cylinder #5 Needle Control Valve Abnormal Operation (MAX)
Detroit DD16 GHG14 (2014-16) Fault Code: SPN 654 FMI 7 (MCM) Injector Cylinder #4 Needle Control Valve Stuck Open
Detroit DD16 GHG14 (2014-16) Fault Code: SPN 654 FMI 6 (MCM) Injector Cylinder #4 Needle Control Valve Shorted Circuit
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