My VW Golf is one of the 'emissions scandal' affected vehicles, still without a fix. A couple of months ago it went into 'limp mode' and a new egr unit was diagnosed as the solution. This was carried out and fixed the fault, however since then the mpg is noticeably lower and I am refueling more often. E.g. motorway driving would usually show 65-70mpg, but is now at 49-55mpg. I am going to ring VW to get it checked out, but wonder if anyone has had a similar problem or knows what's likely to be the cause of this issue?
Many thanks in advance