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.
Circuit Description
Antilock brake system (ABS) equipped vehicles have wheel speed sensors (WSSs) at all 4 wheels. The front WSSs monitor the speed of each wheel by placing a magnetic coupling next to a toothed ring mounted on the axle of each wheel. The rear WSSs monitor speed of each wheel with a magnetic coupling and a toothed ring internal to the wheel bearings. These sensors produce an AC signal that the electronic brake traction control module (EBTCM) uses to calculate the wheel speed. The signal frequency changes with the wheel speed. DTC C0245 will set when the EBTCM cannot specifically identify which WSS is causing the malfunction. DTC C0245 will be in history and the DTC associated with the malfunctioning sensor will be set along with DTC C0245.
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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.