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Why Is the AdBlue Warning Light On in a Citroen C4 Cactus?

Model: Citroen Cactus MK 1 - Years 2014-2020
Part: AdBlue warning light

If the AdBlue warning light has illuminated on the dashboard of your Citroen C4 Cactus, it means that the emissions fluid has reached a too low level and needs to be topped up. This is an extremely simple and quick operation; let's see how to proceed in this tutorial. First, obtain a 10-litre canister of fluid, then turn off the engine, open the boot lid, and remove both the floor panel and the spare wheel. Next, unscrew the large central cap, insert the canister's nozzle into the opening, and pour the necessary amount of fluid into the tank.

Updated on 4 September 2026 by ScegliAuto

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