Error P2563 Turbocharger shovel position sensor

Hello together, am new here and hope you can help me with my problem. I have an Opel Combo and get the error P2563 Turbocharger shovel position sensor again and again. The turbocharger that is in it is brand new (was changed after a turbo damage). The funny thing is that the error is now and again after 2 times restarting is gone and you get 500km about again. Sometimes the error also does not go out at all and the turbo does not work anymore. Night or a day left behind the error is gone again and I come back 800km or so. I use the car professionally and we are on the road a lot. Is the sensor installed in the turbo or can you just change it? Is the new turbo defective? Or could this have quite different causes? Thank you already in advance for your tips. Greeting Jens