Detroit DD13 EPA07 (2007-09) Fault Code: SPN 2791 FMI 3 (MCM) Circuit Failed High

NOTE: Please see the step by step troubleshooting procedures for this specific code.

PROBABLE CAUSES:
1. Wiring between pin 1 of the EGR valve connector and pin 61 of the 120-pin MCM connector.
2. EGR valve failure.