Wheel Speed Sensor Fault
The system has detected a fault with a wheel speed sensor.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
One of the sensors that measures the speed of a wheel is malfunctioning or sending incorrect data to the computer, which can affect braking and stability control systems.
What the computer is actually seeing
The computer expects a consistent voltage signal from the wheel speed sensor, typically between 0.5V to 4.5V, indicating the wheel's speed. If the signal drops out or is inconsistent, it triggers a fault code.
What a healthy reading looks like
Normal voltage signal from the wheel speed sensor should be 0.5V to 4.5V when the wheel is turning; flat voltage below 0.5V indicates no movement or a fault.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the wheel speed sensor wiring and connector for damage or corrosion.
- 22. Check for any obvious signs of physical damage to the sensor itself or the mounting area.
- 33. Measure the voltage at the sensor harness while the wheel is turning. It should be between 0.5V to 4.5V.
- 44. If the voltage is normal, use a scan tool to check for additional fault codes that might indicate more complex issues with the ABS system.
- 55. If no other codes are present, replace the wheel speed sensor if it is faulty based on voltage testing or if it is visibly damaged.
Common causes
- Faulty wheel speed sensor
- Damaged wiring or connectors to the sensor
- Poor connection at the ABS module or ECU
- Physical damage to the sensor or its mount
- Corrosion or dirt affecting sensor performance
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive with this code?
It's drivable, but braking and stability control may be impaired. Fix it soon.
Will this code come back if I clear it?
It may return if the underlying issue isn't resolved, like a bad sensor or wiring problem.
Why does this code sometimes pair with others?
If multiple sensors or systems are affected, they may trigger their own codes related to the same issue.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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