Detroit DD15 GHG14 (2014-16) Fault Code: SPN 4258 FMI 4 (MCM) Injector Amplifier Control Valve Cylinder 4, 5, 6 Shorted to Ground
DESCRIPTION:
This code sets when the MCM detects that there is a short to ground on the circuits for the injector amplifier control valve on cylinders 4, 5 and/or 6.
MONITORED PARAMETER:
Injector amplifier control valve cylinder 4, 5, 6.
TYPICAL ENABLING CONDITIONS:
Fuel Injector system nozzle opening pressure greater than 1.85.
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 rpm 1400 – 1500: One minute.
PROBABLE CAUSES:
1. Connector outside the valve cover.
2. Under valve cover fuel injector harness.
3. Failed fuel injector #4, #5, or #6.
4. Wiring between the valve cover connector and the 120-pin ECM connection.
5. Failed MCM (Engine ECM).
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