I was driving and the first thing I noticed was the ABS light was on. I turned the car off. Then turned it right back on and the ABS light was off. I heard a loud buzzing sound that I never heard before. When I pulled into my garage and turned the Z off the buzzing sound did not stop. I had to disconnect the battery before the sound stopped. I reconnected the battery and went for a drive. A continuous motor buzzing type of sound is off for now. What was it?