P0430 - I haven't had this problem, first mustang, next step?

Question

P0430 catalyst efficiency below threshold bank 2

Answer 1

P0430 Catalyst sytem efficiency below threshold (Bank2)

Exhaust leaks prior to the catalytic convertor? Exhasut leak cans cause a catalytic code condition or any damage to the catalytic convertor?

 Here a Ford that set a P0430, what cause the code condition was a insecure exhaust, The owner purposely did this just for the sound, Check for a exhaust leak such as this would be the first step.