Detroit DD15 GHG14 (2014-16) Fault Code: SPN 2791 FMI 0 (MCM) High Load Operation in High Ambient Temperatures
NOTE: High load operation in high ambient temperatures. No action is necessary; this is a “silent” fault where the fan will be turned on.
NOTE: This fault is a concern only if the fan-on times are excessive but coolant temperatures are in the normal operating range.
PROBABLE CAUSES:
1. If 110-0 is active, repair this first.
2. Check for EGR exhaust leaks at the EGR valve actuator.
3. Remove the actuator cooler lines and fittings, check for kinks/plugs or leaks.
4. EGR valve actuator failure.
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