Brakes problem
2001 Other Jaguar Models V8 Two Wheel Drive Automatic 64000 miles

I have a message that comes up on my system scan that says ASC not available but it doesn't come on all of the time. It seems as though this is a system that should last longer than 64000 miles. Do I need to replace it or is there something else that might be wrong with it. Before you ask I know the button is on. Thanks