Detroit DD15 GHG14 (2014-16) Fault Code: SPN 51 FMI 4 (MCM) Intake Throttle Valve Circuit Failed Low

DESCRIPTION:
This fault code sets when there is an open on the intake throttle valve circuit.

MONITORED PARAMETER:
Intake air throttle

TYPICAL ENABLING CONDITIONS:
Key on

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Always enabled

TYPICAL DURATION:
2 seconds

DASH LAMPS:
1. MIL
2. CEL

ENGINE REACTION:
Derate 10%

VERIFICATION:
Engine Idle: One minute.

PROBABLE CAUSES:
1. Air throttle valve harness.
2. ITV harness connector.
3. Intake throttle valve failure.
4. Cold temperatures may falsly cause this code to appear.
5. Intake throttle valve sensor.

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