Why does abs light come on and off?

The ABS (Anti-lock Braking System) light can come on and off due to various reasons, such as a temporary fault in the system, a malfunctioning wheel speed sensor, or issues with the ABS control module. It may also illuminate if there are problems with brake fluid levels or when the vehicle's traction control system is engaged. If the light persists, it's advisable to have the system diagnosed by a professional to ensure safe braking performance. Regular maintenance can help prevent such issues.