Faulty ABS Wheel Speed Sensor
Indicates an issue with the wheel speed sensor on a vehicle equipped with ABS.
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)
The ABS wheel speed sensor measures how fast each wheel is turning. When it detects a problem, it can mean a sensor is broken or there’s a wiring issue, which can affect the braking system.
What the computer is actually seeing
The ABS controller monitors the wheel speed sensor's voltage signal, expecting it to fluctuate smoothly between 0.5V and 4.5V as the wheel turns. A constant voltage or a signal outside this range indicates a fault.
What a healthy reading looks like
Normal operating voltage from the wheel speed sensor should be between 0.5V and 4.5V, depending on the wheel speed.
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 connectors for damage or corrosion. If there are issues, repair or replace them.
- 22. Measure the voltage signal at the wheel speed sensor connector with the ignition on (engine off). It should be between 0.5V and 4.5V. If not, replace the sensor.
- 33. If the sensor voltage is normal, check the physical condition of the wheel speed sensor. Ensure it is mounted correctly and not obstructed.
- 44. Test drive the vehicle to see if the code returns. If it does, further inspect the ABS module or other related components.
Common causes
- Broken or damaged wheel speed sensor
- Faulty wiring or connectors
- Wheel bearing issues affecting sensor alignment
- Moisture or dirt in the sensor connector
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
You can drive, but be cautious as your ABS may not function properly, especially in slippery conditions.
Will this code come back after clearing?
It may return if the underlying issue isn't fixed; always diagnose the root cause.
Why does this code show up with other codes?
Typically, multiple codes can indicate related sensor or wiring issues.
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