A friend , having had regular ad blue issues and engine warning light issues had his ad blue totally removed and the system cleaned out .
Van was re-chipped giving far better diesel consumption ( ad-blue greatly increases diesel consumption ) and more power .
It sailed through its MOT so ad blue is clearly a total con , only there to fill your CAT with crystals .
Factory ECU’s definitely cleverly programmed to create constant problems .
SHAMEFUL !!!