Hello. Maybe someone has been working on the topic? Volvo FH 2014. Euro6. After connecting the empty cistern, one axle should float in the cistern. The problem is that it does not rise. The problem is certainly in the tractor because I hook the tank under another horse and immediately after turning on the ignition, the axle went up. In the tractor there is no saved problem related to the problem. I also dug everything in the coding and found no problem. The defect occurred apparently after replacing the blocks and sensors in the horse.I think that it's a coincidence.It seems to me that some condition / parameter is not met and the horse blocks this axis. anyone did the subject? I only came for a moment in two weeks, I have to take care of it ... The power supply and the woks checked. The lift axle also.