P0601 error code

That is an internal failure code. Meaning that something inside the vehicles computer system has failed. This can sometimes be fixed by "flashing" the computer fancy word for redownloading the programs. However you may find it cheaper and easier to just replace the computer with one from a wrecker.

Good luck

Thanx for your fast answer!
I could do it at our service center, but I need the PROM software - where can I download it?At my place there is no official service center so engineers ask me to find the image of software somehow. I know it sounds stupid but maybe it possible?
BR,
Anton

Anton my friend,

i have no idea what the engineers are talking about. As far as reflashing the computer programs, i've always sent the vehicles to the dealership. I am sure that the vehicle manufacturers would not allow people to do this procedure themselves.
Which brings me to this point. I strongly suggest you phone a salvage yard, and inquire into a used computer. They will ask you to read a serial number off of the side of your vehicles computer to match to the ones they have, this is because there are more than one different programs for vehicles. If the serial numbers match, buy it. As long as it is under $350 CDN then it is well worth it.

Good luck
-bryan