C0235

Wheel Speed Sensor Signal Erratic

Moderate severity

The ABS control module has detected an erratic wheel speed sensor signal — sudden jumps or dropouts compared to the other wheels. Typical causes are a damaged tone ring or a loose sensor.

Common causes

Tone ring damaged or contaminated with metal debris
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $90-550
Wheel speed sensor loose in housing
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $90-550
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does C0235 mean?

C0235 means "Wheel Speed Sensor Signal Erratic". It is a generic OBD-II code that points to a fault in the chassis.

What are the most common causes of C0235?

tone ring damaged or contaminated with metal debris; wheel speed sensor loose in housing; excessive hub bearing play — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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