Wheel Speed Sensor Fault
Wheel speed sensor circuit has a fault or is not responding as expected.
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 car's computer isn't getting the right signals from the wheel speed sensor, which tells it how fast each wheel is turning.
What the computer is actually seeing
The electronic control unit (ECU) expects to see voltage signals that vary with wheel speed; typically, the voltage should fluctuate between 0 to 5 volts depending on speed. A stuck signal may stay constant at either extreme (0V or 5V) indicating a fault.
What a healthy reading looks like
Normal wheel speed sensor output voltage should be between 0V (stationary) and 5V (active motion), changing with vehicle 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 wiring and connectors at the wheel speed sensor for any damage or corrosion. If damaged, repair or replace as needed. Decision: If wiring is intact, proceed to step 2.
- 22. Measure the voltage at the wheel speed sensor connector with the ignition on (engine off). You should see a voltage between 0-5 volts. Decision: If voltage is correct, proceed to step 3. If voltage is 0 or constant at 5V, the sensor may be faulty.
- 33. Test the resistance of the wheel speed sensor; it should be within manufacturer specs, usually around 1,000 to 2,500 ohms. Decision: If resistance is out of spec, replace the wheel speed sensor.
- 44. Check the wheel speed sensor signal output by using a scan tool to monitor live data during vehicle operation. You should see varying speeds reported. Decision: If the speed is not changing or is erratic, suspect a faulty sensor or control module.
Common causes
- Damaged wiring or connectors to the wheel speed sensor
- Faulty wheel speed sensor
- Faulty brake control module or ABS system issues
- Corroded or dirty connectors
- Tire size difference causing miscommunication between sensors
Typical repair cost
$100-$300
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's best to address this code soon, as it can affect brake performance and stability control.
Will the code come back after clearing it?
If the underlying issue isn't fixed, yes, it will likely reappear.
Why does this code sometimes pair with ABS codes?
Both the ABS and wheel speed sensor systems are interconnected; issues in one can trigger faults in the other.
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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