yeah ive heard these are prone to go on these engine the previous owner just wrapped tape round it.
yeah they scanned for fault code but im not sure of the code. there was a code then it just said low boost pressure intermitent. the car seems to be running ok. plenty of pull
wasnt sure wether the garage was just making that as an exuse as it is waranty work. its gettting replaced now so hopefully that will sort it (i hope so anyway)