What causes the brake light to stay on?
2 Answers
The reasons for the brake light staying on are: 1. Brake disc malfunction or excessive wear; 2. Insufficient brake fluid; 3. Short circuit in the brake warning light circuit. The solutions for the brake light staying on are: 1. Replace the brake pads; 2. Refill brake fluid promptly; 3. Check the circuit. The brake light is installed at the rear of the vehicle with a main red color. Its purpose is to make it easier for following vehicles to detect when the front vehicle is braking under low visibility conditions, thereby preventing rear-end collisions. Brake lights are categorized by material into: 1. Gas brake lights: Feature mature technology but produce radiation; 2. LED brake lights: Feature no radiation, no pollution, and long service life.
I've been driving for twenty years and know that when the brake light comes on, it's usually related to the braking system. The most common issue is worn brake pads—once they thin beyond a certain point, the system triggers a warning light via the sensor. Another possibility is low brake fluid; if the level in the reservoir is too low, it affects braking pressure. It could also be an ABS or electronic stability system malfunction, where the sensor sends an incorrect signal. I've encountered this multiple times before—never take it lightly while driving, as brake failure at high speeds is extremely dangerous. I recommend pulling over immediately to check the brake fluid level. If you can't handle it yourself, head straight to a repair shop or 4S store for professional inspection. Regular maintenance is also crucial—for example, inspect the brake pads every 5,000 kilometers to prevent minor issues from escalating into major problems.
