What is the reason for the ABS light coming on after a vehicle inspection?

[ODawson]

The reason for the ABS light coming on after a vehicle inspection: During the inspection, tailpipe emissions need to be tested. For front-wheel-drive vehicles, only the front wheels rotate during the tailpipe emissions test. For rear-wheel-drive vehicles, only the rear wheels rotate during the tailpipe emissions test. As a result, the ABS warning light may come on after the inspection, which is normal and will resolve after driving for a while. ABS is the anti-lock braking system in a vehicle, which uses wheel speed sensors to detect the rotation speed of the wheels. During the tailpipe emissions test, not all four wheels rotate together, causing the ABS system to perceive a fault in certain components, thus triggering the ABS warning light after the inspection. After driving a certain distance post-inspection, the ABS warning light will turn off.