A friend called to have a look at this car, Opel Zafira A, 1.6 petrol, X16XEL built in 2000. Beaten car, believe me. Complain, lack of power. 264811 Km. Hooked up my diagnostic tool, I got one faultcode: P0443(2) fuel tank ventilation valve voltage low I could not believe this causes a lack of power...