Our 2002 C5 (petrol) has failed the MOT because of high emissions?
Our 2002 C5 (petrol) has failed the MOT because of high emissions, our garage have changed lambda sensors checked EGR for carbonm but still emissions do not come down, they don' know what to try next. We do not really want to go to Citroen main dealer as they will charge a fortune, any ideas.
J Brindley
November 2008