Wheel Speed Sensor Signal Failure
The vehicle's wheel speed sensor is not providing a valid signal.
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 wheel speed sensor measures how fast each wheel is turning. If it fails, the system can't tell if you're speeding up, slowing down, or if a wheel is slipping, which can affect braking and stability control.
What the computer is actually seeing
The control module expects a voltage signal from the wheel speed sensor that fluctuates between 0.5V and 5V, corresponding to the wheel's speed. If this signal drops below 0.5V, stays at a constant value, or is completely absent, it triggers the code.
What a healthy reading looks like
Normal operation should see a varying signal between 0.5V (stationary) and up to 5V (maximum speed), typically around 2.5V at low speeds when braking.
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.
- 1Check the wheel speed sensor connector and wiring for damage or corrosion. Look for frayed wires or loose connections.
- 2Check the resistance of the wheel speed sensor. Typically, it should be around 1k ohm; if not, replace the sensor.
- 3Inspect the sensor reluctor ring for dirt or damage; clean if necessary and replace if defective.
- 4Use a scan tool to monitor the live data for wheel speed while driving. If there's a significant difference between wheels, further diagnostic may be needed.
Common causes
- Broken wire or poor connection in the sensor circuit
- Faulty wheel speed sensor
- Contaminated sensor or wheel bearing
- Failed ABS control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended as it can affect ABS and traction control functions.
Will this code come back after I fix it?
If the underlying issue is resolved, the code should not return.
Why do I see this code with an ABS light on?
The ABS system relies on wheel speed signals, and a failure can trigger both the code and the warning light.
Working a real vehicle right now?
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