There have been many reports of issues with the Adblue system. It occurs right across the Citroen diesel range. It is probably the pump which has failed but the pump is not available separately. I had mine done after this occurred to me about a year ago, and nearly ruined my holiday.
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I'd take it to a dealer but I'm a little distrusting of my dealer due to a previous experience with them but also because I live rurally and it's a whole day to take it to town and hang around for a fix. Is there anyway I can reset the engine on the UREA warning and count down using an app or software and my new OBD2 (WiFi) dongle? Thanks! Dormouse

Today they have informed us that the car's Adblue injector has failed. They said it'll cost about €450 to fix and regenerate the dpf etc. The car is under warranty and so this will be covered.

308K views 6 years ago. This 2016 Citroen C4 Picasso 1.6 Diesel came in for a service with the AdBlue warning showing. In this Video I show you how to go about filling the AdBlue tank. Dopisana dolewka (on-line) w salonie Citroena. Pompa nie podaje dodatku. Rozebrana pompka, silniczek pracuje, napięcie, masa do pompki dochodzi. Brak komunikacji z pompą domieszkowania (nie można wykonać testu) Brak komunikacji z systemem AdBlue (nie można wykonać testu) P1434 U1218 P2A00 U1F00 B1811 . 596 770 386 121 561 684 173 538

citroen c4 grand picasso adblue problem