C0237: Loss of Speed Sensor Signal Front Left
Standardized SAE J2012 code · C02xx 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 C0237 mean?
The ABS control module has lost the wheel speed signal from the front left wheel during driving. ABS and stability control are disabled because wheel-individual speed information is required for slip detection.
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 Wheel speed sensor failed
- Medium Wiring break at wheel arch
- Low Tone ring damaged
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of C0237 on the same make and model first.
C0237 in the community
Ask about C0237No one has posted about C0237 yet
Share your vehicle, the tool you used and what you tested — the first thread helps everyone who searches for this code.
Describe your C0237 problem