Detroit DD15 GHG14 (2014-16) Fault Code: SPN 520296 FMI 31 (MCM) Exhaust Gas Recirculation Valve Actuator, Learn Cycle Incomplete
DESCRIPTION:
The fault code sets when the motor control module (MCM) detects that the exhaust gas recirculation (EGR) valve position is incorrect.
MONITORED PARAMETER:
EGR position error.
TYPICAL ENABLING CONDITIONS:
Engine running
MONITOR SEQUENCE:
None
EXECUTION FREQUENCY:
Always enabled
TYPICAL DURATION:
Two seconds
DASH LAMPS:
1. MIL
2. CEL
ENGINE REACTION:
None
VERIFICATION:
Engine idle
NOTE: If code 168-1 present, fix that first.
PROBABLE CAUSES:
1. Cranking and/or charging system of the truck.
2. Inspect for exhaust leaks around the EGR valve, repair as needed.
3. EGR valve actuator cooler lines/fittings leaking.
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