C0059 DTC: Left Rear Wheel Speed Sensor Circuit High
What Does C0059 Mean?
Diagnostic Trouble Code (DTC) C0059 indicates that the ABS control module has detected a voltage or signal level above the expected operating range in the left rear wheel speed sensor circuit. This condition is typically caused by an open circuit, excessive resistance, poor electrical connections, damaged wiring, or a faulty left rear wheel speed sensor.
Symptoms
- ABS warning light illuminated
- Traction Control (TCS) warning light ON
- Electronic Stability Control (ESC) warning
- ABS disabled during emergency braking
- Traction Control unavailable
- Cruise control may be disabled on some vehicles
- Additional ABS-related DTCs stored
Common Causes
- Faulty left rear wheel speed sensor
- Open circuit in the sensor wiring
- Loose or disconnected electrical connector
- Corroded connector terminals
- Damaged wiring harness
- Damaged tone ring (reluctor ring)
- Incorrect sensor air gap caused by wheel bearing wear
- Faulty ABS control module (rare)
Typical Diagnostic Flow
How to Diagnose C0059
- Read ABS fault codes using a professional scan tool.
- Monitor live wheel speed data while driving.
- Compare the left rear wheel speed with the other three wheels.
- Inspect the sensor wiring for open circuits or damaged insulation.
- Check the connector for loose, bent, or corroded terminals.
- Inspect the tone ring for cracks, rust, or missing teeth.
- Measure sensor resistance and circuit voltage according to manufacturer specifications.
Typical Values
- All wheel speed sensors should display nearly identical speeds during normal driving.
- A consistently high circuit voltage usually indicates an open circuit or poor electrical connection.
- Specifications vary by vehicle manufacturer.
Estimated Repair Cost
- Wheel speed sensor replacement: $70–250
- Wiring repair: $50–200
- Connector replacement: $30–120
- Tone ring replacement: $80–300
- Wheel bearing replacement: $150–500
- ABS module replacement: $400–1,200
Related DTCs
- C0057
- C0058
- C0060
- C0061
- C0062
Frequently Asked Questions
Can I drive with C0059?
Yes. Normal braking remains available, but the ABS, Traction Control, and Stability Control systems may be disabled until the fault is repaired.
What is the most common cause of C0059?
The most common causes are an open circuit, damaged wiring, loose connectors, corroded terminals, or a faulty left rear wheel speed sensor.
Will clearing the DTC permanently fix C0059?
No. Clearing the code only removes it temporarily. If the high-voltage condition remains, the ABS control module will detect the fault again during the next drive cycle.