yamaha teos electronic problem tank indicator/voltage meter and kilometer counter

Hello, since 2001 I’ve been driving my teos 125 and I’ve had the problem for 5 years now or so that my fuel meter changes while driving and my on-board computer spins with the time, the total kilometers and the daily kilometers. I can’t even switch between daily kilometers and total kilometers. I think that’s an electronic problem or somewhere a contact is not in order but I have no idea where. In the past, the problem has solved itself after a longer journey. so if anyone has the same vehicle or the mbk doodoo, and had the same problem, please write how to solve that I would be quite grateful, because the problem made me a traffic obstacle a week ago, I had no fuel on a bridge and had to push over the road because the curb was so high that I could not possibly come up there