C0064 DTC: Left Rear Wheel Speed Sensor Circuit High Frequency
What Does C0064 Mean?
Diagnostic Trouble Code (DTC) C0064 indicates that the ABS control module has detected a higher-than-expected signal frequency from the left rear wheel speed sensor. The sensor is generating more pulses than normal, causing the ABS module to calculate an incorrect wheel speed. This can affect the operation of the Anti-lock Braking System (ABS), Traction Control System (TCS), and Electronic Stability Control (ESC).
Symptoms
- ABS warning light illuminated.
- Traction Control (TCS) warning light ON.
- Electronic Stability Control (ESC) warning.
- Unexpected ABS activation.
- Incorrect wheel speed shown in live data.
- Reduced vehicle stability on slippery roads.
- Cruise control may be disabled on some vehicles.
- Additional ABS-related DTCs stored.
Common Causes
- Faulty left rear wheel speed sensor.
- Damaged or incorrect tone ring.
- Metal debris affecting the magnetic sensor.
- Improper sensor installation.
- Damaged wiring harness.
- Loose or corroded electrical connector.
- Wheel bearing damage causing abnormal sensor readings.
- Faulty ABS control module (rare).
Typical Diagnostic Flow
How to Diagnose C0064
- Read ABS fault codes using a professional scan tool.
- Monitor live wheel speed data during a road test.
- Compare the left rear wheel speed with the other wheels.
- Inspect the tone ring for damage or incorrect installation.
- Check the sensor air gap.
- Inspect the wheel bearing for excessive play.
- Inspect the wiring harness and connector for damage or corrosion.
- Clean any metal debris from the magnetic sensor.
Typical Values
- Wheel speed signals should closely match the other wheels.
- Signal frequency should increase smoothly with vehicle speed.
- Abnormally high frequency indicates an incorrect sensor or tone ring signal.
- Specifications vary by vehicle manufacturer.
Estimated Repair Cost
- Wheel speed sensor replacement: $70–250
- Tone ring replacement: $80–300
- Wheel bearing replacement: $150–500
- Wiring repair: $50–200
- Connector replacement: $30–120
- ABS control module replacement: $400–1,200
Related DTCs
- C0060
- C0061
- C0062
- C0063
- C0065
Frequently Asked Questions
Can I drive with C0064?
Yes. The vehicle can usually be driven, but the ABS, Traction Control, and Stability Control systems may not operate correctly until the fault is repaired.
What is the most common cause of C0064?
The most common causes are a faulty left rear wheel speed sensor, damaged tone ring, incorrect sensor installation, metal contamination on the sensor, damaged wiring, or excessive wheel bearing play.
Will clearing the DTC permanently fix C0064?
No. Clearing the code only erases it temporarily. If the root cause remains, the ABS control module will detect the fault again during the next drive cycle.