Volvo v50 2.0 d jerk

Hi love community I’ve been driving a v50 Bj 2006 100kw 140 tkm for about 1.5 years now I noticed 3 weeks ago or he started to jerk easily between 2 and 3000 revolutions and it seemed to me that he no longer had the full turbo power. Then it was gone again and today already the same thing again. Have checked the current consumption once when he jerks but he goes to 0liter in the push-off. So it’s not the free burning of the Dpf s or??? Someone experiences or a tip where the search should start? Thanks Tina.