WHAT DOES PEUGEOT ADBLUE REMOVAL MEAN?

I have carried out another thing so I wished to share my Option in an effort to try out to aid Other people that have the identical problem. I didn't place a gap in my gas cap (I've older product devoid of white or black dot on top of it) but I have pull off black rubber ring from your neck of the fuel tank which happens to be benith cap and place