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Detroit DD15 GHG14 (2014-16) Fault Code: SPN 3563 FMI 18 (MCM) Inlet Manifold Pressure Low

DESCRIPTION:
This fault code sets when the intake manifold pressure is lower than expected while the engine is under a load.

MONITORED PARAMETER:
Intake manifold pressure.

TYPICAL ENABLING CONDITIONS:
Engine coolant temperature greater than 65°C (149°F).

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Continuous when enabling conditions met.

TYPICAL DURATION:
15 seconds

DASH LAMPS:
1. MIL
2. CEL

ENGINE REACTION:
None

VERIFICATION:
1. Engine coolant greater than 65°C (149°F).
2. Drive at steady highway speed with loaded trailer.
3. Engine rpm greater than 1130 for a minimum of five minutes.

PROBABLE CAUSES:
1. Failed inlet manifold pressure sensor.
2. Inlet manifold pressure sensor connector/harness.
3. Charge air cooler failure.

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