Wheel Speed Sensor Input Circuit Failure
A problem has been detected in the wheel speed sensor circuit.
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 is not receiving a valid signal from the wheel speed sensor, which helps monitor how fast each wheel is turning, usually through a voltage signal between 0 and 12 volts.
What the computer is actually seeing
The control module expects to see a steady voltage signal from the wheel speed sensor while the vehicle is in motion. If the voltage drops below 0.5 volts or is inconsistent, it triggers a fault code.
What a healthy reading looks like
Normal operation sees a voltage near 2-5 volts while the vehicle is moving and an appropriate frequency signal matching wheel 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. Check the wiring and connector to the wheel speed sensor for damage or corrosion; repair as needed. Decision: Is it damaged? If yes, repair. If no, proceed to step 2.
- 22. Measure the voltage at the wheel speed sensor connector with the ignition on (engine off); you should see 5 volts (or around vehicle-specific value). Decision: Is the voltage correct? If no, replace the sensor. If yes, proceed to step 3.
- 33. With the vehicle in motion, check the signal from the sensor; use a scan tool to view the wheel speed data. Decision: Is the speed updating properly? If no, inspect the wiring further and consider replacing the sensor. If yes, verify the module. Proceed to step 4.
- 44. Check for any software updates or resets needed for the control module; consult OEM documentation for procedures. Decision: Did it clear the fault? If yes, monitor. If not, further diagnostics may be needed.
Common causes
- Damaged wheel speed sensor
- Broken or corroded wiring harness
- Faulty connector
- Wheel bearing issues
- Computer fault
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe to drive but expect issues with traction control and ABS. Fix it soon to restore full safety features.
Will the code come back after clearing?
If the underlying issue isn't fixed, it will likely return once the vehicle is in motion.
Why does this code appear with other codes?
Multiple wheel speed sensor codes can indicate issues with signal integrity or shared wiring faults.
Working a real vehicle right now?
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