So due to age of car 7+ years I bought a Adblue Tank off ebay Part Number 9818703780 [Cost £626.39 including 10% Discount Free Delivery ] Removed old tank after draining it. Fitted new tank it and primed with new Adblue switched on could hear Adblue pump run up and stop and UREA light now out. Woody said: Like so many others I too have had past adblue issues, and now it seems they're coming back to haunt me again. Three years ago I got the dreaded 700 miles countdown which resulted in a £600-ish bill following Citroen dealer diagnostics and a nox sensor replacement. Last week, whilst driving to work, I had the emissions fault screen c4 picasso adblue tank citroen 1.6l diesel 9813676080 13-21. £371.00. adblue tank citroen berlingo mk2 b9 08-18 625 enterprise l1 hdi 4 cyl 8v sohc. £120.00. Just curious how many diesel car owners have had their AdBlue caps replaced (for free by Citroen) and how many know about this. As far as I can work out they identified that there's a design issue with the system and brought out a vented version of the cap (in 2018?) to reduce pressure which in turn prevents the injector failing prematurely (but I might be making this up). FUEL TANK CAPACITY Litres (gallons) 90 (19.8) ADBLUE TANK CAPACITY Litres18.6 BlueHDi 140 S&S Van Crew Van 35 35 35 35 Heavy 35 35 Heavy 35 L2 L3L4 H2H3 Capacity (cc) Cylinders / Valves Max power CEE (kW/rpm) 103 (140) / 3750 Max torque CEE (Nm/rpm) 340 (250) / 1750 Bore and stroke (mm) Euro 6.2 Gearbox Number of Gears Low 10.4 - 8.1 (27.1 - 34.9) Eventually, the pump would fail, resulting in the errors you saw on the dashboard. PSA fixed the issue by using an AdBlue cap fitted with a small pressure release valve. If caught in time, a new cap would fix the issue. If not, a new tank was required. Unfortunately for you, your C4 missed the recall and is now outside of the warranty period. The reason for running the car at high speed to clear the particle filter. This is potentially caused by issues with the EOLYS system causing the filter to block. This filter is located just in front of the engine by the turbo. Adblue is required to reduce nitrogen oxide emissions in the catalyst located under the car. AdBlue Tank Replacement / UREA warnings / Emissions Fault / Engine Fault / 700 mile countdown - discussion Citroen c4 cactus. Citroen cactus; 4d ago; 1 78 3d ago o1BKTW.