What should you do if your vehicle’s ABS warning light stays on?

When the ABS (Anti-lock Braking System) warning light remains on, it indicates that there is a problem with the ABS system that needs attention. The correct response is to check the system for issues and service the ABS as needed. The ABS is a crucial safety feature that helps prevent wheel lock-up during braking, which can lead to loss of control of the vehicle.

Addressing the warning light promptly is important because it ensures that your braking system is functioning correctly. If the ABS system has a malfunction, it could compromise the vehicle's braking ability, especially in emergency situations where quick stopping is necessary.

The other options are less appropriate; ignoring the warning light can lead to serious safety risks and should never be an option. Changing the brake fluid might not address the issue with the ABS specifically, and only taking the vehicle for a routine check-up might overlook the immediate need for specific ABS diagnostics. Therefore, the most responsible course of action is to investigate and service the ABS system.