What are the reasons for the electronic brake warning light staying on?

[DiStella]

There are two main reasons why a car's brake warning light stays on: severely worn brake pads and low brake fluid level. Here are the detailed explanations: 1. Severely worn brake pads: Brake pads come in two types - those with wear sensors and those without. For pads equipped with wear sensors, when the brake pad wears down to its limit, the sensor automatically completes an electrical circuit, triggering the warning light. 2. Low brake fluid level: Brake fluid plays a crucial role in a vehicle's braking system. When the driver presses the brake pedal, the force applied is transmitted by the master cylinder piston through the brake fluid to the wheel cylinders at each wheel, causing the brake pads to contact the wheels and stop the vehicle.