Wheel Speed Sensor B Circuit Malfunction
The control module has detected a fault in the wheel speed sensor circuit for sensor B.
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)
There’s a problem with the signal from the speed sensor on one of the wheels, so the system can't figure out how fast the car is going at that wheel.
What the computer is actually seeing
The computer looks for a signal between 0 and 5 volts from the wheel speed sensor, correlating with wheel speed. If the signal drops below 0.5V or goes over 4.5V, it triggers a fault.
What a healthy reading looks like
Normal wheel speed signals should vary from 0 to 5 volts depending on vehicle speed. At rest, expect ~0V, and while driving, around 2-5V depending on 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. Visually inspect the wiring and connector for sensor B for any obvious damage or corrosion. If damaged, repair or replace as needed.
- 22. Use a multimeter to check the wheel speed sensor signal. Test at the sensor connector; expect between 0 to 5 volts while rotating the wheel. If no signal, replace the sensor.
- 33. If the signal is within range, inspect the vehicle’s wiring harness for continuity. A voltage drop of less than 0.2V is acceptable across the circuit. If greater, repair the wiring.
- 44. If the wiring is good and the sensor replaced still yields the code, check for issues with the control module itself. Verify all connections are secure. If all checks out, consider replacement of the control module.
Common causes
- Bad wheel speed sensor
- Damaged wiring or connectors to the sensor
- Corrosion in connector terminals
- Faulty control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to address this code soon, as it impacts traction control and ABS systems, which are critical for safety.
Will the code come back after a reset?
If the underlying issue isn't fixed, yes, the code will likely return after a reset.
Why does this code pair with other wheel speed sensor codes?
Multiple wheel speed sensor codes can indicate an issue in the same circuit or a systemic problem in the speed monitoring system.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →