ABS (Antilock Brake System) wheel speed sensors monitor each wheel's rotation and alert the ABS controller when a wheel loses traction or locks during braking. These sensors, located at each wheel, can be damaged by road debris or fail due to heat and vibration. A faulty sensor triggers the ABS warning light and disables the system until the issue is resolved. Replace malfunctioning wheel speed sensors to restore full ABS functionality and ensure safer braking.
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