Is there an inherent flaw with the Volvo V40?

Our two year old Volvo V40 2.0 has been in the garage for nine weeks undergoing tests and repair for an emission problem. We have been told that there is an inherent flaw in the design, is this true?
This has Volvo's own 2.0 litre 184PS twin turbo diesel engine. I ran one for 6 months, in a Volvo S60 averaging nearly 60mpg with no problems. This is the first report of problems. It has a very sophisticated fuel injection system specifically designed to run on superdiesel (not ordinary premium diesel) so if you have been running it on supermarket diesel that might be the reason for the problem.
Answered by Honest John on

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