Why Are My Brake Lights Staying On While Driving

#1 Brake Light Switch Turns Bad
Sometimes the brake light switch gets faulty and it doesn’t cut the electrical signal that shows the brake lights. This is one of the uncommon failures to take place as manufacturers usually put high-quality switches but in rare cases, it might be the reason why brake lights remain on. Consider replacing the switch and you are good to go! [official website]
#2 Resting Foot On Brake Lights
If you are one of those drivers who put their feet on the brake pedal even before pressing it, then this can be a reason why the brake lights are showing on. Even if you put light pressure on the brake pedal, it will still show that your brakes are engaged. To fix this, make sure you are not touching the brake pedal even in the slightest manner.
#3 CAN Bus System Malfunction
CAN Bus system incorporated in a vehicle can fail, which will lead to brake lights won't turn off while you are driving. This is due to hardware or software problems in the vehicle. It is recommended to get it fixed by a professional.
Why Brake Lights Stay On When Car Is Off

Have you wondered why your brake lights are on when you have already turned off the vehicle? Well, brake lights can simply work even when the engine and ignition are off, this is the reason you will see the brake lights are still turned on.
Hence, the problem will remain the same as mentioned above in the section of “Why Brake Lights Doesn't Turn Off While Driving.”