What Causes the Car Brake System Warning Light to Illuminate?
2 Answers
Here are the main reasons why the car brake system warning light may illuminate: 1. Malfunction in the brake system. This can lead to poor or failed braking, unilateral braking deviation, braking noise, brake drag causing brake drum overheating, or parking brake failure. 2. Low brake fluid level. This affects braking performance and driving safety, and the vehicle should be taken to a repair shop as soon as possible. 3. The handbrake is not released or not fully released. The handbrake should be checked promptly. 4. ABS (Anti-lock Braking System) failure. During emergency braking, the ABS adjusts the pressure in the brake lines based on wheel speed to keep the wheels in a state of intermittent locking and rolling, preventing dangerous situations.
Previously when my car's brake warning light came on, I knew I had to check it immediately. The most common issue is low brake fluid level, possibly due to leaks or evaporation. Just pop the hood and check the reservoir - if it's below the minimum line, top it up with the specified fluid. Another reason could be severely worn brake pads; when the pads get too thin, the system detects it and triggers the warning, requiring immediate pad replacement. ABS system malfunctions can also cause this, such as dirty sensors or electronic module failures. Last time my light came on, I pulled over and found low fluid level. I added some myself, but still took it to the shop later for hydraulic pressure testing. Neglecting this could lead to brake failure, which is extremely dangerous at highway speeds. I recommend regular maintenance - inspect the braking system every six months, and change fluids according to the manual. Safety is the bottom line in driving.
