Kia Troubleshooting Questions? Ask a Mechanic
Hello, the brake switch definitely could cause the cruise to not disengage. However it would not cause the vehicle to not stop. If the brakes are actually not working when you step on the pedal there is another issue. When you say that it still advances by itself what do you mean?
Ok, when it happens does the pedal vibrate or push back at all? Or alternatively does it go to the floor?
Unfortunately I am not able to take a call right now, I will open up your question to other professionals if you would like.