Eolys Fluid System

[u/PandasRO2023]

Hello guys, I recently bought a mazda 3 bk 2006. Car runs great and looks great but it has check engine light on because of Eolys Fluid Tank which is empty. The car had the dpf removed and then remapped so it runs great, no smoke, clean pipe. I deleted the error, light turned off, but when I filled the tank it got back. SO my question is " That to do with engine light, fill the tank with eolys even that i don't have dpf, or fill it with disel because i read the this additive goes in fuel system...". THANK YOU!!