What is the reason for the ABS light being on while driving?

[LeIsla]

The reasons for the ABS light being on while driving are: 1. ABS wheel speed sensor failure; 2. ABS circuit failure; 3. ABS pump or pressure regulating solenoid valve failure; 4. ABS computer failure. The function of ABS is to prevent the wheels from locking up during emergency braking. The principle of the ABS system is to use sensors on the four wheels to detect the wheel speed. If excessive braking force causes the wheels to lock up and stop rotating, the sensors will send a signal to the computer, which will then reduce the braking force on the locked wheels to allow them to rotate again. Once the wheels start rotating, the braking force is restored, and the wheels may lock up again. Through this cycle, the wheels brake in a pulsing manner, with the pulsing action occurring more than 13 times per second, preventing wheel lock-up, skidding, and loss of control.