ABS Wheel Speed Sensor Input Signal Missing
The ABS control module is not receiving a valid wheel speed signal from one or more wheel speed sensors.
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What it means (plain English)
There’s a problem with the wheel speed sensor sending data to the ABS system. This means the system can't track the speed of the wheels properly, which can affect braking.
What the computer is actually seeing
The ABS control module expects to see a variable voltage from the wheel speed sensors. Normally, you'd see a pulse signal oscillating between 0-5 volts depending on wheel speed.
What a healthy reading looks like
0-5 volts; expected frequency varies with speed (e.g., 2-10 Hz at low speeds, up to 400 Hz at 60+ mph).
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 damage or corrosion. Ensure tight connections. Decision point: Is the wiring intact? If yes, proceed. If no, repair wiring/connectors.
- 22. Check the wheel speed sensor resistance: should be around 1,000-2,000 ohms. Decision point: Is resistance within range? If yes, continue. If no, replace the wheel speed sensor.
- 33. Scan for additional codes. If other wheel-related codes are present (e.g., C0035), diagnose those first. Decision point: Are additional codes present? If yes, address them first.
- 44. Use a scan tool to monitor live data. Check for wheel speed sensor output while rotating wheels. Decision point: Are valid readings showing? If yes, the problem may be with the ABS module. If no, replace wheel speed sensor.
Common causes
- Faulty wheel speed sensor
- Damaged wiring or connectors
- Faulty ABS module
- Corrosion or dirt on the sensor
- Issues related to wheel bearings or hubs
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity suggests you should fix it soon, as it can affect braking performance.
Will the code come back after clearing it?
If the underlying issue isn't fixed, it's likely to return.
Why does this code sometimes pair with traction control issues?
ABS data is used for stability control; if the ABS sees an issue, it can disable traction control.
Working a real vehicle right now?
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