Hi, bin proud owner of a 2000er Lupos (VW Lupo 6X/6E 1.0, 50 PS, 999ccm) engine code: AUC. But have the following problem: the speed fluctuated quite slightly to medium, to this the error blows on me the engine light. In the meantime, however, it runs again very well and keeps the speed constant at 1000 revolution, which seems to be too high (according to statements from others). In the cold as well as warm condition it is 1000 revolution. In the cold condition it fluctuates, in the warm condition it is better. Have already done some things and thus almost all the errors eliminated, currently stands in it –> “16891 idle speed control P0507-35-00 – speed over target value”. (VCDS read out). I can screw and also have my own original VCDS, which is ahead. The Lupo is thought as a second car for the city and actually I didn’t want to invest much, but as it always happens, I am still doing this, then he runs at least neatly and a motor light bothered me too. So was dirty. the AGR really cool was made.