C0050 – Right Rear Wheel Speed Sensor Circuit
What does C0050 mean?
The right rear wheel speed sensor circuit has a malfunction. Like the other wheel speed sensors, it supplies the ABS module with individual wheel rotation data used for anti-lock braking and stability control.
What causes C0050?
Listed from most to least common:
- 1Corroded connector from underbody exposure
- 2Damaged wiring
- 3Failed wheel speed sensor
- 4Debris on the sensor tip
- 5Rusted or damaged tone ring
- 6Wheel bearing play
Code breakdown
Common symptoms
- ABS and stability control warning lights on
- Those systems disabled
- Normal braking retained
- Possible speedometer or shift behavior changes on some models
How to diagnose
- 1Inspect the connector and wiring for corrosion and physical damage.
- 2Remove the sensor and check for metal debris on the tip.
- 3Compare all four wheel speed readings in live data during a slow drive.
- 4Measure sensor resistance against specification.
- 5Inspect the tone ring condition.
- 6Check for excessive wheel bearing play.
ABS, traction control, and stability control typically shut down. Regular braking continues to work normally.
Common fixes and estimated costs
| Repair | Estimated cost |
|---|---|
| Clean sensor/connector | $50–$180 |
| Repair wiring | $150–$400 |
| Replace wheel speed sensor | $150–$400 |
| Replace hub assembly | $300–$800 |
Costs are rough US estimates including parts and labor. Actual pricing varies significantly by vehicle, region, and shop rates.
Good to know
If multiple wheel speed sensor codes appear at once, suspect the ABS module, its power supply, or a shared harness problem rather than several sensors failing simultaneously.
Related codes
This information is provided for general reference only and may vary by manufacturer, model, and year. It is not a substitute for professional diagnosis or repair.