I have a VW Golf GTI X reg and the engine management light is coming on ive had a diaognostic check on it and the codes cleared,but it has come on again not only that it seems to be losing power and drinking the petrol I had the lamba sensor replaced early december last year as was on motorway and the light appeared and the car was rattling and juddering as though there was no fuel in the tank (there was by the way)............can somebody please give me any suggestions as to what this might possibly be as dont want to get ripped off by garage.