PEUGEOT ADBLUE DELETE NO FURTHER A MYSTERY

I need to resolve it quick as on Friday I'm heading for the periodic Look at RWC. I haven't any diagnostic program, do you think that by removing the battery I'm able to reset the error if I'll change the adblue injector?It’s worth noting that AdBlue degrades after some time, so there’s little point preserving unused Option inside the garage.To