Had a day off today so did Mr.Muscle turbo cleaning. All went ok as per the guide on this forum until I was taking it for a spin afterwards. Was driving along ok, there was plenty of power in the car. Got to about 80mph in 5th and the engine management light came on. Pulled in, turned the car off and back on. Engine management light stayed on. Went for a spin again and there was no power in 3rd, 4th or 5th. Struggled to get to 70. Eventually managed to get to 75mph.
Tried to disconnect the battery to clear the light but it made no difference. Any ideas?
Edit: Meant to add 2003 B6 1.9 TDI 130bhp