Help with fault codes

[a3 turbp]

hello, I did a vcds scan on my Audi s3 8p. It came back with fault codes p0234 and p0327. After a quick search I've found it's to do with my n75 valve but it always seems to relate to the 2.0tdi engines. Can anyone help with this please?

Thanks

 

[a3 turbp]

Does anyone know?