1. Low brake fluid: Check the brake fluid level in the reservoir. If it's low, fill it up to the recommended level.
2. Faulty brake light switch: The brake light switch is responsible for turning on the brake lights when you press the brake pedal. If it's faulty, it won't send a signal to the brake lights, and they won't light up. Check the brake light switch and replace it if it's faulty.
3. Faulty VDC system: The Vehicle Dynamic Control (VDC) system uses sensors to monitor wheel speed, steering angle, and lateral acceleration. If any of these sensors is faulty, it can cause the VDC system to malfunction and the VDC light to light up. Check the VDC system for any faults and repair them accordingly.
4. Faulty ABS system: The Anti-lock Braking System (ABS) is related to the VDC system. If the ABS system is faulty, it can cause the VDC system to malfunction and the VDC light to light up. Check the ABS system for any faults and repair them accordingly.
If you're not comfortable checking these things yourself, it's best to take your car to a qualified mechanic to have it diagnosed and repaired.
