P0500 Code: Vehicle Speed Sensor Malfunction
The engine computer is not receiving a valid signal from the vehicle speed sensor, which reports road speed for the speedometer, cruise control, transmission shifting, and ABS.
What this means for driving
A failed speed sensor mainly affects instruments and assists rather than the engine itself, but it can make transmission shifting erratic and disable cruise control and ABS functions — all reasons to have it assessed promptly. If shifting has become harsh or the car behaves unpredictably, avoid high-speed driving until it is checked.
When in doubt, have a mechanic assess it promptly. If any of the red-flag symptoms below are present, stop driving and arrange a tow rather than risking it.
Important: This page is general information only — not professional mechanical advice and not a diagnosis for your specific vehicle. Fault causes and severity vary by make, model, year, and condition. A qualified mechanic should confirm any diagnosis before you make driving decisions or authorize repairs.
Red-flag symptoms: stop and get help
- Transmission shifting harshly or unpredictably
- Speedometer dead while driving at speed
- ABS or traction warning lights appearing alongside it
Symptoms of P0500
- Speedometer dead, erratic, or stuck
- Harsh or poorly timed transmission shifts
- Cruise control not working
- ABS or traction-control warning light
- Check-engine light on
- Odometer not advancing
Most likely causes, ranked
- Faulty vehicle speed sensor — the most common cause
- Damaged wiring or connector to the sensor
- Damaged tone ring or drive gear the sensor reads
- Fault in the instrument cluster or ABS module reading the signal
How a mechanic diagnoses it
- Speed-sensor signal checked with a scan tool while the wheels turn.
- Wiring and connector inspected; sensor output compared with specification.
- Tone ring and drive gear inspected if the sensor tests good.
Likely fixes
- Replace vehicle speed sensor
- Repair wiring or connector
Repair costs vary by vehicle, region and shop. Get a quote from a local mechanic.
Related codes
- P0700: Transmission Control System Malfunction
- P0335: Crankshaft Position Sensor 'A' Circuit Malfunction
CheckMyCarCode content is general information only and is not a substitute for professional diagnosis. Trouble-code meanings are standardized for generic (P0xxx) codes, but causes, severity, and repairs vary by vehicle. If your car shows a red-flag symptom, stop driving and get professional help.