C0040Medium urgency

Right Front Wheel Speed Sensor Circuit

Chassis · ABS/Traction Control

⚠️ Fix soon — ABS and traction control disabled.

What this means

The right front wheel speed sensor has a circuit fault. This disables ABS and traction control for that corner. Braking distances increase on slippery surfaces.

Likely causes

Failed wheel speed sensorMost common
Damaged sensor wiring (common from road debris)Most common
Damaged ABS tone ringCommon

Estimated repair cost

Wheel speed sensor replacement$100 – $300

Wiring harness repair$75 – $250

Tone ring replacement$100 – $300

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Frequently asked questions

What does C0040 mean?

The right front wheel speed sensor has a circuit fault. This disables ABS and traction control for that corner. Braking distances increase on slippery surfaces.

Is C0040 serious?

Fix soon — ABS and traction control disabled.

How much does it cost to fix C0040?

Repair costs for C0040 range from $100 – $300 depending on the root cause and your vehicle.

Can I drive with C0040?

You can drive short distances but should have it repaired within 1-2 weeks to prevent further damage.