Detroit DD13 GHG14 (2014-16) Fault Code: SPN 641 FMI 4 (MCM) Turbocharger Control Circuit Failed Low
NOTE: Please see the step by step troubleshooting procedures for this specific code.
PROBABLE CAUSES:
1. Wiring between the wastegate control solenoid and the 120-pin MCM connector.
2. Wastegate control solenoid failure.
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