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.
PINPOINT TEST E : WHEEL SPEED SENSOR ELECTRICAL FAULT DTCs - FRONT: Notes
Diagnostic Overview
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Service Information for information about these practices.
Refer to Vehicle Dynamic Systems , for schematic and connector information.
Normal Operation and Fault Conditions
Refer to Wheel Speed Sensor in Wheel Speed Sensor .
When the ignition 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. An open circuit, a short to ground or a short to voltage in any wheel speed circuit causes the ABS module to disable the power output to the sensor(s) and set 1 or more DTCs.
To clear any wheel speed sensor DTCs from the ABS module, after repairing the cause of the DTC, cycle the ignition from ON to OFF and back to ON. Then drive the vehicle for at least 1 minute at speeds above 20 km/h (12 mph).
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| C0031:01 | Left Front Wheel Speed Sensor: General Electrical Failure | These DTCs set in continuous memory and on demand when there is a short to voltage, a short to ground or an open circuit on 1 or both of the wheel speed sensor circuits. |
| C0034:01 | Right Front Wheel Speed Sensor: General Electrical Failure | |
| C0031:12 | Left Front Wheel Speed Sensor: Circuit Short to Battery | These DTCs set in continuous memory and on demand when the ABS module detects short to voltage on 1 or both of the wheel speed sensor circuits. |
| C0034:12 | Right Front Wheel Speed Sensor: Circuit Short to Battery | |
| C0031:14 | Left Front Wheel Speed Sensor: Circuit Short to Ground or Open | These DTCs set in continuous memory and on demand when the ABS module detects short to ground or an open condition on 1 or both of the wheel speed sensor circuits. |
| C0034:14 | Right Front Wheel Speed Sensor: Circuit Short to Ground or Open | |
| C0032:11 | Left Front Wheel Speed Sensor Supply: Circuit Short to Ground | These DTCs set in continuous memory and on demand when the ABS module detects short to ground or an open condition on the wheel speed sensor voltage supply circuit. |
| C0035:11 | Right Front Wheel Speed Sensor Supply: Circuit Short to Ground |
Possible Causes
- Wiring, terminals or connectors
- Wheel speed sensor
- ABS module
Visual Inspection and Diagnostic Pre-checks
Make sure the wheel speed sensor harness is routed correctly and is undamaged.
Make sure the wheel speed sensor electrical connector is free from any corrosion or other contaminants.
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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.