Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Normal Operation and Fault Conditions
Active wheel speed sensors generate a square wave signal proportional to wheel speed which is sent to the ABS module. Each wheel speed sensor is connected to the ABS module through 2 wires and a connector at each wheel speed sensor. The 2 circuits provide both sensor power and sensor signal return. When the ignition mode is set to ON, the ABS module carries out a self-test by sending a reference voltage through the wheel speed sensors and their circuitry.
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| C0031:11 | Left Front Wheel Speed Sensor: Circuit Short to Ground | Sets when the ABS module detects a short to ground in the sensor signal return circuit or if the sensor has an internal short to ground. |
| C0034:11 | Right Front Wheel Speed Sensor: Circuit Short to Ground | Sets when the ABS module detects a short to ground in the sensor signal return circuit or if the sensor has an internal short to ground. |
| C0031:15 | Left Front Wheel Speed Sensor: Circuit Short to Battery or Open | Sets when the ABS module detects a short to battery voltage or an open in the sensor signal return circuit. A short to battery voltage may be due to the sensor signal return circuit and the sensor voltage supply circuit shorted together. These DTCs also set if the sensor has an internal short to battery voltage or an open circuit. |
| C0034:15 | Right Front Wheel Speed Sensor: Circuit Short to Battery or Open | Sets when the ABS module detects a short to battery voltage or an open in the sensor signal return circuit. A short to battery voltage may be due to the sensor signal return circuit and the sensor voltage supply circuit shorted together. These DTCs also set if the sensor has an internal short to battery voltage or an open circuit. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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