NOTE: Please see the step by step troubleshooting procedures for this specific code.
NOTE: If codes for other modules are present, fix those first.
PROBABLE CAUSES:1. Improper programming of the CPC (Common Powertrain Controller).2. Other failed modules on the truck (Transmission, ABS, Cab controller, etc…).3. Battery/battery cable issues, or electical issue on truck.
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 84 FMI 8 (CPC) Vehicle Speed Sensor Anti-Tamper Detection Via Antilock Brake System Message Missing
Detroit DD13 GHG14 (2014-16) Fault Code: SPN 84 FMI 7 (CPC) Vehicle Speed Signal Hall Effect VSS Wiring Mismatch, Rationality Fault
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