Detroit DD15 GHG14 (2014-16) Fault Code: SPN 656 FMI 7 (MCM) Injector Cylinder #6 Needle Control Valve Stuck Open

DESCRIPTION:
Injector cylinder #6 needle control valve stuck open.

MONITORED PARAMETER:
Injector cylinder #6 needle control valve.

TYPICAL ENABLING CONDITIONS:
Engine rpm = idle or higher.

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Continuous when enabling conditions met.

TYPICAL DURATION:
Two seconds

DASH LAMPS:
1. MIL
2. CEL

ENGINE REACTION:
Derate 25%

VERIFICATION:
Engine Idle: One minute.

NOTE: Submit completed diagnostics with warranty claim.

PROBABLE CAUSES:
1. Bent pins.
2. Spread pins.
3. damaged connector seal.
4. Faulty rear fuel injector harness.
5. Faulty injector with the out-of-range resistance.
6. Corroded pins.
7. Unseated pins.
8. Damaged wire.
9. Faulty MCM.