Wheel Speed Sensor Circuit Failure
The wheel speed sensor for the ABS system has detected an issue.
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 computer isn't getting the right signals from the wheel speed sensor, which tells it how fast each wheel is turning. This can mess with the anti-lock brakes and stability control.
What the computer is actually seeing
The ABS module expects a varying voltage signal between 0.5V to 2.5V, corresponding to wheel speed. If it reads a constant voltage or values outside this range, it triggers the code.
What a healthy reading looks like
Normal wheel speed sensor output voltage varies with speed. At 0 MPH, it should be around 0.5V; at 30 MPH, it should reach around 1.5-2.5V depending on the vehicle.
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 wiring and connectors for the wheel speed sensor. Check for damage, corrosion, or loose connections. If found, repair or replace as needed. Decision point: If wiring is okay, proceed to step 2.
- 22. Disconnect the wheel speed sensor connector. With the ignition on, measure the voltage at the harness side. It should read around 5V reference. Decision point: If voltage is correct, proceed to replace the wheel speed sensor; if not, check the ABS module or wiring for issues.
- 33. Check the tone ring for damage or debris. Clean or replace as necessary. Decision point: If the tone ring is fine, replace the wheel speed sensor.
Common causes
- Faulty wheel speed sensor
- Poor wiring or connectors
- Damaged sensor teeth on the tone ring
- Corrosion on terminals
- Faulty ABS control module
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
It's not recommended to drive; the ABS may not function properly, increasing stopping distance in emergencies.
Will this code come back after clearing?
If the underlying issue isn't fixed, yes, the code will likely return after clearing.
What happens if I ignore this code?
Ignoring it can lead to reduced braking performance and compromised vehicle safety.
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