Wheel Speed Sensor Performance Problem
Indicates an issue with the wheel speed sensor's performance.
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 wheel speed sensor reads how fast each wheel is turning to help with traction control and ABS; if it's faulty, those systems can act erratically.
What the computer is actually seeing
The ABS or traction control module expects a stable voltage signal from the wheel speed sensor. If the signal fluctuates wildly or drops out, the module sets this code.
What a healthy reading looks like
Normal wheel speed should indicate a voltage signal between 0.5V and 5V, depending on wheel speed. Signals should be within 5% of each other during normal operation.
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 connector for the wheel speed sensor for any visible damage or corrosion. Fix any issues found. Decision: If repairs are made, clear the codes and recheck.
- 22. Test the wheel speed sensor with a multimeter. Check for a proper voltage output while spinning the wheel. Decision: If voltage is within expected range, proceed to step 3; if not, replace the sensor.
- 33. Check the ABS module for faults using a scan tool. Match any related code with wheel speed readings. Decision: If other codes are present, address those issues; if only C0442 remains, check the ABS module for failures. Replace if necessary.
Common causes
- Damaged or corroded wiring to the wheel speed sensor
- Faulty wheel speed sensor
- Bad ABS module
- Contaminated sensor area (dirt or debris)
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's moderate severity; you may experience issues with traction control and ABS, so drive cautiously and fix soon.
Will this code come back after clearing?
If the underlying problem isn't fixed, yes; it will likely return.
Why do I see this code with other wheel speed codes?
Codes like C0031 usually indicate issues with a specific wheel sensor, while C0442 relates to performance across the system.
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