Once you top up the brake fluid, n the light is off. But do u know why the brake fluid is low. The brake fluid will not go away without reason because the brake fluid is stored in a seal unit. I have not check your vehicle, but there could be a leak from the brake system. Or very simple, the brake has been worn out n caused that. Do not quote what I guess.I recommend you have the vehicle check up. A simple inspection would make a peace of mind.