Suddenly very high diesel consumption Volvo v50 2.0d

Hello together, I’ve had a super high consumption for a week now. When starting up, there is a current consumption of over 50 l on the display. When rolling (i.e. 4-6 gear) and 50 kmh there is a consumption of 20 l on the display. I thought it was due to the regeneration of the DPF but that can’t take place all the time now for almost a week, right? I’ve been driving with my already over 100,000 km and the problem now. I’ve always driven the car with an average of 6.3 l in summer and 6.6 l in winter. Now the consumption is on average 8.9 l. Something’s wrong, isn’t it? Do you have a tip for me before I have to go back to the workshop?