Detroit DD15 GHG14 (2014-16) Fault Code: SPN 2791 FMI 10 (MCM) Coolant Temperature High-Alarm

DESCRIPTION:
This fault code sets when the EGR actuator temperature is greater than 134°C (275°F).

MONITORED PARAMETER:
EGR temperature

TYPICAL ENABLING CONDITIONS:
Engine running

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 running

PROBABLE CAUSES:
1. If any voltage codes exist, fix those first.
2. EGR valve actuator pull rod.
3. EGR actuator.
4. EGR valve.
5. Wiring between the EGR actuator harness and the ECM.