NOTE: Please see the step by step troubleshooting procedures for this specific code.
NOTE: If codes are present relating anything to battery or voltages, repair those first.
PROBABLE CAUSES:1. CPC (Engine ECM) has been improperly programmed or configured.2. The source problem is other computers (Transmission, ABS, Cab, etc…) on the truck.
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 84 FMI 6 (CPC) Vehicle Speed Sensor Anti-Tamper Detection via Antilock Brake System Vehicle Speed Comparison
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 84 FMI 5 (CPC) Vehicle Speed Sensor Open Circuit
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 84 FMI 5 (MCM) Vehicle Speed Sensor Open Circuit
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 84 FMI 4 (MCM) Vehicle Speed Sensor Circuit Failed Low
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 84 FMI 4 (CPC) Vehicle Speed Sensor Circuit Failed Low
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 84 FMI 3 (MCM) Vehicle Speed Sensor Open Circuit