C0008 Code – Rear Right Wheel Speed Sensor Circuit

The C0008 Diagnostic Trouble Code (DTC) indicates that the Anti-lock Braking System (ABS) control module has detected a malfunction in the rear right Wheel Speed Sensor (WSS) circuit. The Wheel Speed Sensor monitors the rotational speed of the rear right wheel and provides this information to the ABS module for proper operation of the ABS, Traction Control System (TCS), and Electronic Stability Control (ESC).

What Does C0008 Mean?

C0008 means the ABS module has detected an abnormal signal or an electrical problem in the rear right wheel speed sensor circuit. The fault may be caused by an open circuit, short circuit, damaged wiring, poor electrical connections, a failed wheel speed sensor, or a damaged reluctor (tone) ring.

Symptoms of C0008

• ABS warning light illuminated.
• Traction Control (TCS) warning light on.
• Electronic Stability Control (ESC) warning light illuminated.
• ABS system disabled.
• Traction control unavailable.
• Reduced vehicle stability on slippery roads.
• Possible speedometer inaccuracies on some vehicle models.

Common Causes

• Faulty rear right Wheel Speed Sensor (WSS).
• Damaged or broken sensor wiring.
• Loose or corroded electrical connector.
• Metal debris accumulated on the sensor tip.
• Damaged or cracked reluctor (tone) ring.
• Excessive wheel bearing play affecting sensor clearance.
• Faulty ABS control module (rare).

How to Diagnose C0008

1. Retrieve ABS trouble codes using a professional scan tool.
2. Compare live wheel speed data from all four wheels.
3. Inspect the rear right wheel speed sensor and wiring.
4. Clean the magnetic sensor tip if contaminated.
5. Inspect the reluctor ring for cracks, rust, or missing teeth.
6. Check the rear wheel bearing for excessive movement.
7. Measure sensor resistance and wiring continuity with a multimeter.

How to Fix C0008

• Replace the faulty Wheel Speed Sensor (WSS).
• Repair damaged wiring or connectors.
• Clean the sensor tip.
• Replace the damaged reluctor ring.
• Replace a worn wheel bearing if excessive play exists.
• Replace the ABS control module only after all other components have been properly tested.

Can You Drive With C0008?

Yes, the vehicle can usually still be driven because the standard hydraulic braking system remains functional. However, the ABS, Traction Control, and Electronic Stability Control systems may be disabled, reducing braking performance and vehicle stability during emergency maneuvers or on slippery road surfaces.

Repair Cost Estimate

Repair	Estimated Cost (USD)
Wheel Speed Sensor replacement	$80–$250
Wiring repair	$50–$200
Reluctor ring replacement	$100–$350
Wheel bearing replacement	$200–$600

Related Trouble Codes

• C0035 – Left Front Wheel Speed Sensor Circuit
• C0040 – Right Front Wheel Speed Sensor Circuit
• C0045 – Left Rear Wheel Speed Sensor Circuit
• C0050 – Right Rear Wheel Speed Sensor Circuit

Frequently Asked Questions

What is the most common cause of C0008?

A failed wheel speed sensor, damaged wiring, dirty sensor tip, or a damaged reluctor ring is the most common cause.

Can a bad wheel bearing cause C0008?

Yes. Excessive wheel bearing play can change the distance between the sensor and reluctor ring, resulting in an incorrect wheel speed signal.

Will clearing the code permanently fix C0008?

No. Clearing the code only removes it temporarily. Unless the underlying problem is repaired, the ABS module will detect the fault again and store the code.

Conclusion

C0008 indicates a malfunction in the rear right Wheel Speed Sensor circuit. Inspecting the wheel speed sensor, wiring, reluctor ring, and wheel bearing will usually identify the root cause. Prompt repairs restore full ABS, traction control, and electronic stability system performance and improve overall driving safety.