What does it mean when the ABS light on the car is on?

[VonBrielle]

When the ABS light on the car is on, it indicates a fault in the ABS system. ABS refers to the Anti-lock Braking System of the car, which continuously monitors the car's wheels to ensure they turn at the same speed. During braking, the ABS system controls the braking force to keep the wheels in a state of rolling and sliding (with a slip rate of about 20%), preventing them from locking up. This ensures maximum traction between the wheels and the road, avoiding skidding. If the ABS locks up and the car cannot move, the following diagnostic and troubleshooting steps should be taken: 1. Check the power supply circuit of the ABS regulator to eliminate power supply faults; 2. Check if the battery voltage is too low—if the battery is not at 12V, replace the battery or repair the charging system; 3. If the ABS control unit is faulty, take the car to a 4S shop for repair or replacement; 4. If the wheel speed sensor is faulty, check if the half-shaft gear has foreign objects stuck to it, which may damage the reluctor ring or solenoid valve—repair or replace the sensor or reluctor ring; 5. If there is a fault in the indicator light circuit, replace the instrument cluster.