What is the reason for the ABS light being on?
2 Answers
The reasons for the ABS light being on are: 1. The ABS wire is broken or the plug is loose; 2. The electronic control device is of poor quality; 3. The fuse has blown for some reason. If the ABS light does not come on when the ignition switch is first turned on, the reason may be that the speed signal has not been transmitted to the ABS control unit. If the ABS sometimes works and sometimes doesn't, the reason may be a mechanical failure. If the ABS light is frequently on, it means the system has detected an ABS system error, and it is recommended to have it checked as soon as possible, as this is directly related to travel safety. When a fault occurs, it is necessary to first determine whether the vehicle's usual travel environment and the obstacles encountered by the car are related to the ABS fault, and then make corresponding repairs. Usually, the ABS light is on for a very short time, and if the system detects no problems after self-checking, it will turn off by itself. If you press the brake pedal quickly to the bottom while driving, the ABS light will also come on. Additionally, when the car is started, the ABS light may come on, but it will turn off when the brake is released.
The ABS light coming on is quite concerning to me because it involves braking safety. ABS stands for the Anti-lock Braking System, and when the light illuminates, it indicates a detected malfunction. Common causes include the wheel speed sensor being covered in mud or oil, leading to inaccurate signals; the sensor itself being damaged or worn out, resulting in erroneous data output; loose or short-circuited wiring connections causing signal interruptions; issues with the control unit module, such as software errors or hardware burnout; and blown fuses, which protect the circuit but cut off functionality. Driving, especially in rainy or snowy conditions, with a malfunctioning ABS can increase braking distance or the risk of tire lock-up. I've had a personal experience: after a long trip, the light came on, and upon inspection, it turned out the left front sensor connector was loose—pushing it back in turned the light off. It's advisable to regularly keep the sensors clean by wiping them with a soft cloth. If the light comes on, don’t delay; use an OBD diagnostic tool to scan for trouble codes or go directly to a repair shop—safety first.
