1. Brake system failure: Brake pads may not work normally due to brakes, brake fluid or corrosion.
2. Electrical system failure: For example, circuit failure such as brake switch and brake light switch causes ECU to fail to receive brake signal and misjudge it as normal driving state.
3. Mechanical failure: For example, the brake lever and connector are loose or damaged, resulting in the brake system not working normally.
4. Software problem: There may be a fault in the ECU of the vehicle or a problem in the software program, resulting in the brake system not working normally.
5. Tire problems: For example, insufficient tire pressure and serious tire wear may lead to poor braking effect or even failure of the vehicle.