Hi guys, I recently bought an Audi A4 B7 2.0T FSI FWD and decided to get it remapped, when I took it on a test drive it went into limp mode and would go over 3/4K and struggle to gain speed, it was like the turbo wasn’t working. I checked the error codes and I got this:

16618/P0234/000564

Which suggests a faulty N75 or G31, does this sound like this could be causing the issue or could it be something deeper like the ECU? Thanks