Engine stable on the highway at RPM > 3000

I have the following problem with my Citroën Berlingo (110 Ps petrol from 2018, 70 000km +): In normal everyday life (urban traffic/urban road …) If the vehicle runs without big problems. A while ago the engine light went on after the engine start, but after a few restarts it went off again. Yesterday the real problem started: If you give gas on the motorway, so drive with such over 3000 revolutions* (5/6 gear) the engine goes into a kind of emergency mode. In the cockpit the STO lights up P lamp and the oil lamp (red) and the on-board computer prompts you to stop driving immediately (oil pressure is too low). The engine no longer takes any more gas. If you stop now and start the engine again, everything runs back to normal until you just exceed the above threshold. I have also read out the error memory today: p2176 throne actuator control system – idle position not learned The car goes to the dealer in a few weeks and I get a new one. That’s why I want now Does anyone have an idea what it might be or what I can do about it? Thank you in advance Paul * (The values might differ somewhat, I have not documented that so precisely now)