What are the reasons for the ABS light to come on?

[LaJudah]

There are several reasons for the ABS light to come on: 1. When the vehicle is first started and the ignition switch is turned on, the vehicle undergoes a self-check procedure, during which the ABS light will illuminate. After the check is completed, the ABS indicator light will automatically turn off. 2. If the ABS indicator light comes on while driving, it indicates a malfunction in the ABS anti-lock braking system, which could be due to a faulty sensor or wiring issue that prevents signal transmission. 3. During an annual vehicle inspection, the ABS indicator light may come on after the exhaust test. This happens because during the test, the front wheels rotate for an extended period while the rear wheels remain stationary. Under normal driving conditions, the rotation speeds of the front and rear wheels do not differ significantly. The system may interpret this as an ABS fault, causing the indicator light to illuminate. Simply turning off the engine and waiting for a few seconds before restarting will usually make the ABS light turn off on its own.