Madalint

Hi guys, recently I bought an audi a6 2.0 automatic year 2007 and few days ago on my way to work car start losing power , didn't want to go over 4000 rpm and turbo stopped. Now every time when i start the engine , car is working fine for couple minutes and after same problem appears. There are no errors lights on dashboard.
i went today to a garage and they found error :

P1883 Park/ neutral
Intermittent

any ideas ??