Detroit DD16 GHG14 (2014-16) Fault Code: SPN 4257 FMI 4 (MCM) Injector Amplifier Control Valve Cylinder 1, 2, 3 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 1, 2 and or 3.
MONITORED PARAMETER:
Injector amplifier control valve cylinder 1, 2, 3.
TYPICAL ENABLING CONDITIONS:
Fuel injector system nozzle opening pressure reading 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 #1, #2, or #3.
4. Wiring between the valve cover connector and the 120-pin ECM connection.
5. Failed MCM (Engine ECM).
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