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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

  1. Test signal output
  2. Check wiring
  3. Test sensor

Repair Notes

Replace VSS or repair wiring.

Related Codes

P0500Vehicle Speed Sensor AP0503Vehicle Speed Sensor A Intermittent/Erratic/High

Other Powertrain Codes

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

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