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Error P20E8 is not always the fault of the AdBlue tank

Model: (Various brands) Various
Part: AdBlue warning light

In this video, we see that the notorious error P20E8 is not always attributable to the AdBlue tank, and that it is not necessary to replace it as often advised. The real issue could be the electrical contacts that become disconnected when removing the tank, which may just need cleaning. It is also advisable to purge the pipe by cleaning the inside with compressed air, allowing crystallised residues to fall into a container. The YouTuber also provides useful information about a supplier capable of regenerating your tank. Remember that keeping the tank full prevents the AdBlue inside from crystallising.

Updated on 12 September 2026 by ScegliAuto

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