What causes the brake lights to stay on in a 2013 Mondeo?

[OBrooklyn]

The reason is a lack of brake fluid, which is an indispensable part of the vehicle's braking system. A shortage won't cause poor braking performance, so simply adding brake fluid will resolve the issue. Types of brake lights: 1. Gas brake lights: These use gas materials, such as halogen. Gas brake lights are technologically mature and inexpensive, but they emit radiation, contain mercury, and have glass casings that can easily break, leading to environmental pollution. 2. LED brake lights: These use LED materials. LED brake lights are radiation-free, environmentally friendly, and have a long lifespan, theoretically lasting up to 60,000 hours—meaning they won't require bulb replacement during the vehicle's lifespan. However, LED brake lights are more expensive, which has somewhat limited their widespread adoption.