C0039: Right Rear Tone Wheel
Standardized SAE J2012 code · C00xx codes
Safety-critical system. Faults in airbags, brakes, steering or high-voltage components can put people at risk. Follow the manufacturer's service information and safety procedures, or have the vehicle checked by a qualified workshop.
What does C0039 mean?
Fault detected on right rear tone wheel (pulse ring).
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Common causes
- High Tone ring damaged or contaminated
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of C0039 on the same make and model first.
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