I just wanted to add some info after finding this forum really useful after the dreaded urea light came on in our 2015 Grand Picasso when the tank was nearly full. Citroen really came through on this for us - supplied a new part free and we only paid $500 labour and was sorted before the car stopped completely! Car was over a year out of warranty but apparently this problem my be covered up to 8 years / under 100000 km if there is also a full service history. I would have been very unhappy if we’d been left with a $4500 repair. Unfortunately this is the final straw for us in terms of ownership of a European car - after a scary $8000 of repairs covered during the final year of warranty and a couple since we’ve decided to order a new (non- French) car which is a shame as my family have owned Citroens and Peugeots for decades.