* Low brake fluid: This is the most common cause. Check your brake fluid reservoir (usually a clear plastic container) and add fluid if it's low. However, adding fluid is only a temporary fix; you need to find and repair the leak causing the low fluid.
* Brake light bulb burned out: Less likely to trigger the brake light indicator, but possible. Check all your brake lights (tail lights and center high-mounted brake light).
* Brake system malfunction: This is the most serious possibility. It could indicate a problem with:
* Brake pads or shoes worn out: Worn brake pads/shoes reduce braking effectiveness and may trigger the light.
* Brake master cylinder failure: This is a critical component and failure can result in complete brake loss.
* Problem with a wheel cylinder or caliper: These components are responsible for applying the brakes at each wheel. A leak or failure in one can lead to the warning light.
* Brake pressure sensor malfunction: This sensor monitors brake fluid pressure and can trigger the light if it detects a problem.
* Parking brake engaged: Sometimes, if the parking brake isn't fully released, the warning light may illuminate.
What you should do:
1. Check brake fluid level: This is the first and easiest thing to do.
2. Check brake lights: Make sure all your brake lights are functioning.
3. Do NOT drive the car if the brake fluid is low or if you suspect a serious brake problem. Driving with a faulty brake system is extremely dangerous.
4. Have the vehicle inspected by a qualified mechanic immediately. They can diagnose the exact cause of the problem and perform the necessary repairs.
Ignoring a brake light can lead to dangerous situations. It's always better to err on the side of caution and get it checked out right away.
