Recently the break warning lights/tone have been going off randomly. Since it isnt but about 60% of the time I figured it may have been the break fluid. check it and topped off. still same issue. I did have a catalytic converter repaired recently and the issue didn't start up until the day after that repair. So maybe they bumped passenger front ABS sensor? Any thoughts what elso to look at?

Thanks.

 

I know I had a similar problem after I did my rear struts and found that I knocked the brake light sensor loose. Its a good enough place to start..