Detroit DD16 GHG14 (2014-16) Fault Code: SPN 3860 FMI 3 (CPC) Digital Input 4 18 – Failed High on Pin 18 Circuit of the Common Powertrain Controller #4 Connector

Posted by PerDiezel Solutions on April 23, 2026

NOTE: The common powertrain controller (CPC) digital outputs have the same SPN as some motor control module (MCM) faults.

NOTE: If ECM has been programmed recentely, check programming to ensure it is correct.

NOTE: Otherwise, fix the open circuit on pin 18 of the CPC4 #4 connector

WARNING!