If you are reading this, chances are you've got problem with your UREA ad Blue tank.. I stumbled across this platform myself in search of a possible solution to my car ad blue tank problem. Have a 65 plate 1.6 eHDi auto with 73000 miles, that start to show the emissions control fault with the range counter before no start. Took the car to the the dealer for diagnostic which cost £118 and turns out to be a problem with the UREA tank which needs to be replaced with a new one and quoted me around £1300 to fix including labour. Equipped with information already gathered from this platform, thank you very much, I contacted Citroen directly on (0800 0939393) and opened a case with them. I must say that Citroen was very helpful and understanding. Long story short, they agreed to pay towards the cost of the new tank only and I will have to bear the rest as we'll as the cost of labour. That was more than enough for me. So my car was fixed with Citroen helping out with part cost of a new tank. The whole process took around 2 weeks. So my gratitude to everyone who has taken the time and effort to share their experiences here which has really helped and will continue to help others too who find themselves in similar situations. If your vehicle has the same UREA/ad Blue tank problem, get a diagnostic from the dealer and open a case with Citroen directly and you will sure get the assistance you require. Thank you all again. Stay well.