[Il Fenomeno 415]

So I just got a new bumper cover replaced and 2 days later all of a sudden my PDC alarm is acting up. As I'm putting car in reverse, the alarm is making a constant sound with nothing visible behind the car? Anyone else have this problem?

I'm starting toget angry bc with y luck geting rear ended by some idiot, I fear a whole string of problems will start to arise. Please respond if anyone else experienced this issue-thanks...