Detroit DD15 GHG14 (2014-16) Fault Code: SPN 656 FMI 3 (MCM) Injector Cylinder #6 Needle Control Valve Abnormal Operation (MAX)
DESCRIPTION:
Injector cylinder #6 needle control valve abnormal operation (MAX).
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:
2 seconds
DASH LAMPS:
1. MIL
2. CEL
ENGINE REACTION:
Derate 25%
VERIFICATION:
Engine Idle: One minute.
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.
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