recently I have had a problem with my audi a3 2.0 tdi 140 dsg 05 bkd engine, basically when I put my foot down on accelerator a few long periods on the motorway, it just feels like something switches off and I lose power but when I switch my car off and switch it back on it seems fine again anyone had this same problem. Also I checked it on vcds and it came up with an engine fault code of 16618 - boost pressure regulation: limit exceeded (overboost condition) p0234-000