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So, the other day, this issue popped up, P20E8 reductant pressure too low. The adblue consumption is crazy high, I can see crystals forming on the exhaust. The dealer "diagnosed" that injector has to be replaced and wants arm and a leg for it (560€ for the part and 200€for the work).

So, I decided to ask for advice on forums and try to replace the part myself.

The thing is, i'm not sure if its injector thats faulty. I have taken it off after the quick warmup, and seems to inject just fine.
Here is the video of how it works:

Any advice? Is it a known problem? Could be something else, like the pump, computer...?

Thanks for any feedback.
 

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I have measured multiple times Audi/Skoda adblue systems and in my opinion this quantity is too much. Thats why you have crystals in exhaust. There must be something with the pressure or the injector. But proper diagnosis requires right repair manuals and diagnostic tools.
 
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