Wheel Speed Sensor Sensor A Circuit Range/Performance Problem
The wheel speed sensor signal for sensor A is out of expected range.
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What it means (plain English)
The computer is reading an unusual signal from wheel speed sensor A, meaning it thinks there's a problem with that sensor or its wiring.
What the computer is actually seeing
The ECU expects a square wave signal from the wheel speed sensor that reflects the wheel's rotation. A properly functioning sensor should give a voltage signal that varies between 0.5V to 5V as the wheel spins.
What a healthy reading looks like
When the vehicle is moving, the sensor output should generally be between 0.5V to 5V depending on the speed, and at a standstill, it should be close to 0V.
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.
- 1Check the wiring and connector at the wheel speed sensor A for any visible damage or corrosion.
- 2Test the resistance of the wheel speed sensor A. It should typically be between 1000 to 2000 ohms. Replace if out of spec.
- 3Using a scan tool, monitor the wheel speed sensor A data while the vehicle is moving. Expected values should follow the wheel speed accordingly: 0.5V to 5V.
- 4If the sensor output is erratic or outside expected range while moving, replace the wheel speed sensor A. If normal, check ABS module or wiring further.
Common causes
- Faulty wheel speed sensor A
- Wiring damage or corrosion to wheel speed sensor A
- Connector issues at the wheel speed sensor
- ABS module calibration issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity, so it's recommended to fix soon but you can drive cautiously.
Will this code come back after I clear it?
If the underlying issue isn't fixed, yes it will likely come back.
Why might this code appear with other codes?
Different wheel speed sensors can affect overall ABS performance, leading to multiple codes being set.
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