NOTE: Please see the step by step troubleshooting procedures for this specific code.
PROBABLE CAUSES:1. If 677-2 inactive, clear the code, start the engine, and if it doesn’t come back release the vehicle.2. Wiring on the MCM 21-pin connector between pin 20 and ground. Should have 11.5 or more volts.3. Wiring on the CPC connector #1 between pin 18 and ground. If less than 11.5 Volts, repair wiring.
Detroit DD13 EPA10 (2010-13) Fault Code: SPN 656 FMI 6 (MCM) Injector Cylinder #6 Needle Control Valve Shorted Circuit
Detroit DD13 EPA10 (2010-13) Fault Code: SPN 656 FMI 4 (MCM) Injector Cylinder #6 Needle Control Valve Abnormal Operation (MIN)
Detroit DD13 EPA10 (2010-13) Fault Code: SPN 656 FMI 3 (MCM) Injector Cylinder #6 Needle Control Valve Abnormal Operation (MAX)
Detroit DD13 EPA10 (2010-13) Fault Code: SPN 655 FMI 6 (MCM) Injector Cylinder #5 Needle Control Valve Shorted Circuit
Detroit DD13 EPA10 (2010-13) Fault Code: SPN 655 FMI 4 (MCM) Injector Cylinder #5 Needle Control Valve Abnormal Operation (MIN)
Detroit DD13 EPA10 (2010-13) Fault Code: SPN 655 FMI 3 (MCM) Injector Cylinder #5 Needle Control Valve Abnormal Operation (MAX)