Hello Patrick - with this fault code there are no other symptoms that the vehicle is showing?
The item you replaced already was the pressure converter? #2 below, part number
11657599547 here? I have seen individuals report this code and the issue fixed with the replacement of this item for BMW's. Or was it your diverter valve? I have seen this code associated with MINI's resulting in a torn diaphragm in the diverter valve. Did you test the wastegate? I've seen BMW's with this fault and it resulted in a failed wastegate. The wastegate is the bottom item on the turbo on the image below. Unfortunately, I don't believe you can get the wastegate alone and have to get the whole turbo so it definitely is worth troubleshooting to see if it may be your cause. Let me know what you find out.
