“Motor power reduced” ?

Hello dear community, I hope you can give me a tip where I can get ready for it. Short story…. I’m on the way from Berlin to Austria, quickly down the A9 with my V70II (Bj.2000 147kw softturbo). Suddenly the car is jerking, the message “engine power reduced” comes up, it no longer accepts gas. I roll with 180 right on the stand strip. Engine is still running, but very uneven! I turn off the engine, wait briefly and start normal again And look, it’s running completely normal, the message has also disappeared (not even available anymore). And the rest of the trip he ran completely normal again. It was very cold outside. LMM or throttle flap??? I had the DK cleaned three months ago. Or control unit? The Turbo? Unfortunately I don’t know about all the stuff. On the computer I would say he just hung up. Should I just have my car resette with Volvo??? Ok, wasn’t so qualified. Abe r maybe one of you knows where the mistake might be! Thank you already in advance for your help Greetings from Berlin