The engine control unit was defective and was repaired by a specialist company. The processor was fixed by error 2 “Data problem between Eprom and processor ” so they told me that. Now I have the engine control unit installed again and my car still doesn’t start. Does not sound,only the control displays light up,battery is full but it doesn’t do anything. Error memory I still can’t read out (was not before the rep either) . Can it be that it needs to be learned to drive the control unit,although the processor is not new? Had already with Volvo tel. but the knowledge had nothing to have had with it even without the car!!!It’s clear that you also want to earn money. Wanted to have a precise error description from the company that repaired the engine control unit,but more than “processor error” could not tell me. Would be nice if I could be helped.