P0502
Vehicle Speed Sensor A Low Input
2002-2002 Dodge Ram 2500 5.9L I6 Cummins Diesel
Moderate SeverityPowertrainGeneric (SAE)
The 2002 Dodge Ram 2500 is equipped with a 5.9L inline-6 diesel engine. Below you'll find detailed p0502 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
Low or no signal from VSS.
Symptoms
- Speedometer reads zero
- No shifting
- Cruise control dead
Common Causes
- Faulty VSS
- Open circuit
- Disconnected sensor
Diagnostic Steps
- Test signal output
- Check wiring
- Test sensor
Repair Notes
Replace VSS or repair wiring.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0502 on Other Vehicles
Common Questions
What does code P0502 mean on a 2002-2002 Dodge Ram 2500?
P0502 stands for "Vehicle Speed Sensor A Low Input". Low or no signal from VSS.
What are the symptoms of P0502 on a Dodge Ram 2500?
Common symptoms of P0502 include: Speedometer reads zero, No shifting, Cruise control dead.
What causes P0502 on a 2002-2002 Dodge Ram 2500?
Common causes of P0502 include: Faulty VSS, Open circuit, Disconnected sensor.
Last updated: March 2026