Wheel Speed Sensor Circuit Low Input
The wheel speed sensor is sending a low voltage signal to the ABS module.
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What it means (plain English)
The wheel speed sensor monitors how fast the wheel is turning. If it sees a low signal, it thinks there's a problem with that sensor or its wiring.
What the computer is actually seeing
The ABS module is expecting a voltage signal between 0.5V to 5V from the wheel speed sensor. If the voltage drops below 0.5V, it triggers the C0112 code.
What a healthy reading looks like
Wheel speed sensors should read between 0.5V to 5V when the vehicle is moving. At standstill, it should show near 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.
- 11. Visually inspect the wheel speed sensor and connector for damage or corrosion. If found, repair or replace. -> Decision Point: Is the wiring or connector damaged? YES: Repair/replace. NO: Continue to next step.
- 22. Check the sensor's resistance with a multimeter. Should be around 1,000 to 2,500 Ohms. -> Decision Point: Is the resistance within specs? YES: Continue. NO: Replace the sensor.
- 33. Using a scan tool, monitor the wheel speed sensor voltage as the wheel turns. Should fluctuate between 0.5V to 5V. -> Decision Point: Is the voltage signal normal? YES: Check ABS module. NO: Replace sensor.
Common causes
- Faulty wheel speed sensor
- Damaged wiring or connectors
- Corrosion at the sensor or connector
- Faulty ABS module
Typical repair cost
$$-$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe but the ABS may not function properly, so fix it soon.
Will this code come back after clearing?
If there's a genuine issue, yes. Keep checking for faults until resolved.
Why does this code show up with other codes?
Codes related to wheel speed sensors often appear together due to shared wiring or components.
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