Wheel Speed Sensor Circuit Failure
A wheel speed sensor circuit is malfunctioning or not providing accurate data.
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What it means (plain English)
The computer uses wheel speed sensors to monitor how fast each wheel is turning. If one of these sensors has a bad connection or is damaged, the system can't figure out if the wheels are spinning properly, which can affect traction control and anti-lock braking systems.
What the computer is actually seeing
The module expects a specific voltage signal between 0 and 5 volts. When the wheel speed sensor is functioning, it outputs a varying voltage based on the wheel's speed. If it sees a voltage that’s consistently too low (near 0V) or non-responsive, it triggers this code.
What a healthy reading looks like
When functioning correctly, the wheel speed sensor should output around 0.5V to 4.5V, depending on the speed of the wheel. At a stop, expect around 0.5V; at highway speed, close to 4.5V.
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.
- 1Inspect the wiring and connectors for the wheel speed sensor. Look for corrosion, loose connections, or physical damage.
- 2Check the sensor itself for any signs of damage or dirt buildup.
- 3Use a multimeter to measure the voltage output of the wheel speed sensor while the vehicle is at rest and then at a low speed (under 20 mph).
- 4Compare the voltage readings to expected values; if not within range, consider replacing the sensor.
Common causes
- Damaged wheel speed sensor
- Corroded or loose wiring/connector
- Rust or debris interfering with sensor operation
- Bad wheel bearing affecting sensor position
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive if this code is present?
Yes, but be cautious. It affects traction and ABS systems; you may find longer stopping distances and loss of traction control.
Will this code come back if I clear it?
Yes, if the underlying issue isn't resolved, the code will likely return after the next drive cycle.
Why does this code pair with other codes?
Multiple codes can indicate sensor issues or broader system faults, especially involving the ABS or traction control modules.
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