Regarding your question, the lighting of abs warning light is related to many factors. The sensing part of abs speed sensor is covered by dust, dirt and other pollution sources, which affects the sensor to sense the corresponding speed signal, making abs computer unable to judge the speed, and then unable to issue corresponding action instructions to control braking. At this time, as long as the dirt on the speed sensor is cleaned and the gap between the speed sensor and the signal gear ring is adjusted, it can return to normal. Secondly, the abs light will light up after the speed sensor is damaged, and the abs sensor must be replaced; Then, due to the loose connection of abs line and the internal failure of abs pump, the abs light will also light up, which needs a comprehensive inspection.