C0007 Code – Rear Left Wheel Speed Sensor Circuit

The C0007 Diagnostic Trouble Code (DTC) indicates that the Anti-lock Braking System (ABS) control module has detected a malfunction in the rear left Wheel Speed Sensor (WSS) circuit. The Wheel Speed Sensor continuously monitors the rotation speed of the rear left wheel and sends this information to the ABS module for proper operation of the ABS, Traction Control (TCS), and Electronic Stability Control (ESC) systems.

What Does C0007 Mean?

C0007 means the ABS module has detected an abnormal electrical signal from the rear left wheel speed sensor circuit. The problem may be caused by an open circuit, short circuit, weak sensor signal, excessive air gap, damaged reluctor ring, or a failed wheel speed sensor.

Symptoms of C0007

• ABS warning light illuminated.
• Traction Control (TCS) warning light on.
• Electronic Stability Control (ESC) warning light illuminated.
• ABS system disabled.
• Reduced traction control performance.
• Loss of stability control assistance.
• Possible speedometer inaccuracies on some vehicles.

Common Causes

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

How to Diagnose C0007

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

How to Fix C0007

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

Can You Drive With C0007?

Yes, the vehicle is generally still safe to drive under normal conditions because the hydraulic braking system remains functional. However, the ABS, Traction Control, and Electronic Stability Control systems may be disabled, reducing braking performance and vehicle stability on slippery roads or during emergency maneuvers.

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 C0007?

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

Can a worn wheel bearing trigger C0007?

Yes. Excessive wheel bearing movement can alter the sensor air gap and cause inaccurate wheel speed readings.

Will clearing the code permanently fix C0007?

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

Conclusion

C0007 indicates a fault in the rear left Wheel Speed Sensor circuit. Careful inspection of the sensor, wiring, reluctor ring, and wheel bearing will usually identify the root cause. Repairing the issue restores full ABS, traction control, and electronic stability system performance.