What causes the ABS light to come on after vehicle annual inspection?
2 Answers
Vehicle annual inspection after abs light is on the reason is that the four wheels of the car speed is not the same when testing, the computer collects the wrong data caused. ABS is the anti-lock braking system, the role is in the car braking, automatic control of the brake force size, so that the wheels are not locked, in the state of rolling and sliding, to ensure that the wheels and the ground adhesion, improve the safety factor of the vehicle emergency braking when driving. The role of ABS is: 1, give full play to the effectiveness of the brake, shorten the braking time and distance; 2, can effectively prevent the vehicle skidding and tail flick when emergency braking, with good driving stability; 3, can turn when emergency braking, with good steering maneuverability; 4, can avoid the violent friction between the tire and the ground, reduce tire wear.
After my car's annual inspection last year, the ABS light also came on, which really freaked me out at the time. Later, I asked a familiar technician and learned that it might be due to iron debris sticking during the roller test at the inspection station, which dirtied the wheel speed sensor. Those roller devices at inspection stations spin incredibly fast and are especially prone to picking up brake pad dust. Additionally, during the inspection, they frequently apply the brakes for testing, which might trigger temporary fault codes in the system. Another possibility is that they accidentally loosened the sensor connector while checking the circuits. My advice is to first park the car in a safe spot, turn it off, and wait for ten minutes to let the system reset itself—sometimes the light will go out. If that doesn’t work, you’ll need to take it to a shop and use a diagnostic tool to check the fault codes.
