C0044 DTC: Right Front Wheel Speed Sensor Circuit Intermittent/Erratic
What Does C0044 Mean?
Diagnostic Trouble Code (DTC) C0044 indicates that the ABS control module has detected an intermittent or erratic signal from the right front wheel speed sensor circuit. The signal may disappear momentarily, fluctuate unexpectedly, or become inconsistent with the signals from the other wheel speed sensors, affecting ABS, Traction Control (TCS), and Electronic Stability Control (ESC) operation.
Symptoms
- ABS warning light illuminated
- Traction Control (TCS) warning light ON
- Electronic Stability Control (ESC) warning
- Unexpected ABS activation during low-speed braking
- Traction Control disabled
- Cruise control may be unavailable on some vehicles
- Intermittent ABS operation
- Additional ABS-related DTCs stored
Common Causes
- Faulty right front wheel speed sensor
- Intermittent wiring connection
- Loose or corroded electrical connector
- Broken or damaged wiring harness
- Cracked or rusty tone ring (reluctor ring)
- Wheel bearing wear causing excessive sensor air gap
- Metal debris on a magnetic wheel speed sensor
- Faulty ABS control module (rare)
Typical Diagnostic Flow
How to Diagnose C0044
- Read ABS fault codes with a professional scan tool.
- Monitor live wheel speed data while driving.
- Compare the right front wheel speed with the other wheels.
- Move the wiring harness while observing live data to locate intermittent faults.
- Inspect the connector for corrosion, moisture, or loose terminals.
- Check the tone ring for cracks, missing teeth, or heavy rust.
- Inspect the wheel bearing for excessive play.
Typical Values
- All four wheel speed sensors should display similar speeds during normal driving.
- Signal dropouts or sudden speed changes indicate an intermittent sensor or wiring fault.
- 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
- C0041
- C0042
- C0043
- C0045
- C0050
Frequently Asked Questions
Can I drive with C0044?
Yes. Normal braking remains available, but the ABS, Traction Control, and Stability Control systems may not function correctly until the fault is repaired.
What is the most common cause of C0044?
The most common causes are an intermittent wheel speed sensor, damaged wiring, loose connectors, a cracked tone ring, or excessive wheel bearing play.
Will clearing the DTC permanently fix C0044?
No. Clearing the code only removes it temporarily. If the intermittent signal fault remains, the ABS module will detect it again during the next drive cycle.