I have a 2001 Audi a4 2.8 Quattro with 105,xxx miles. I had my wheel bearing replaced and as soon as it was replaced my abs light and brake light would turn on. Now it turns on and beeps for about 10 seconds then shuts off when I turn my car on. It has only done this 3 times in the past month and it does not stay on so is there a sensor issue here?

Also just today my Auto Check System on my car is completely blank. I pressed the button on the dash like the manual said to but it just said service then went back to being blank. Is this another sensor issue or is a fuse blown?