Anyone ever came across error code 234 I know it's something to do with the turbo but not 100% sure what it is exactly

Try taking the vacuum pipe of the turbo and suck, you shouldn't be able too! If you can then I had the same problem and it was the pressure sensor

Just fount my old post on here. My error code was PO299 boost pressure control sensor some maybe not the same. Sorry

Hope you get it fixed