Detroit DD16 EPA10 (2010-13) Fault Code: SPN 84 FMI 21 (CPC) Vehicle Speed Sensor Erratic
DESCRIPTION:
Vehicle speed sensor erratic.
MONITORED PARAMETER:
Vehicle Speed Sensor (VSS).
TYPICAL ENABLING CONDITIONS:
1. Rpm greater than 1500.
2. Torque demand on.
MONITOR SEQUENCE:
None
EXECUTION FREQUENCY:
Continuous when enabling conditions met.
TYPICAL DURATION:
10 seconds
DASH LAMPS:
MIL
ENGINE REACTION:
None
VERIFICATION:
1. Rpm greater than 1500.
2. Torque demand on.
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 electrical issue on truck.
4. Vehicle speed sensor.
5. Vehicle speed sensor harness/connector.
![Volvo Penta EPC 6 Offline VMware [12.2021] VMware](https://www.ecuforcetruck.com/wp-content/uploads/2022/11/VOLVO-PENTA-2021-A-300x300.jpg)
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