Limp mode

[Adamc]

Hoping someone can help iv bought a 2007 a3 tdi been fine for first two weeks now today as I was driving along it seemed to drop the turbo, I drove to a carpark turned turned it off and restarted it now its fine. It didn't over heat or lose and oil or water.. Can anybody help and hopefully not tell me the turbo is knackered 😕😕 as I don't know how I'd stand as iv only owned it a couple weeks but bought it privately..... Thanks