Diesel Trouble Codes

P0500 — Vehicle Speed Sensor A Malfunction (6.7 Power Stroke)

Concise diagnostic reference for P0500 on 6.7 Powerstroke. Focuses on diagnosis of vehicle-speed signal loss, prioritized by likelihood. No step-by-step repair…

Updated September 1, 2026

What it means

The PCM sees no or implausible vehicle-speed signal.1

Most likely causes

  1. ABS module / CAN data loss to PCM — On this platform P0500 is usually a wiring/ABS-module data issue rather than the engine.1
  2. Wiring/connector faults in vehicle-speed signal path — Generic definition is PCM sees no or implausible vehicle-speed signal; typical on this platform is wiring/ABS-module data issue rather than engine.1
  3. Instrument cluster / network communication fault — Vehicle speed is distributed via CAN; loss of CAN messages can present as P0500. Supported by generic definition of no/implausible vehicle-speed signal.1

How to diagnose

  1. Verify freeze-frame conditions and confirm P0500 is active with no accompanying ABS codes.
  2. Check live data for vehicle speed PID from PCM vs ABS module to isolate source of missing/implausible signal.
  3. Inspect CAN network integrity and related wiring/connectors for the ABS module and PCM.
  4. Review ABS module DTCs and data; P0500 on 6.7 Powerstroke is usually a wiring/ABS-module data issue rather than the engine.

Parts and tools you may need

Rough cost and difficulty

Cost varies by root cause; wiring/connector repairs typically lower cost than module replacement. Diagnosis time dominates.

When to see a pro

If ABS module replacement or CAN wiring repair is indicated, have a qualified diesel technician perform diagnosis and repair. Do not attempt repairs to safety-critical systems. If limp mode or drivability concerns occur, stop driving and seek professional service.

Sources

  1. Curated DTC seed — 6.7 Powerstroke (curated) ↩︎ ↩︎ ↩︎ ↩︎