Today my 2017 cat was sitting in my garage for 40 min or so after I got back home and weird electronic noise started coming out from engine block every 12-15 seconds. Sounds like a chime or 2 beeps (one long one short) type. No clue. Took to dealership, they never heard of such a thing. So I waited there for 30 min, never came on. Got back home and in an hour it started again. Any help would be appreciated.