PEUGEOT ADBLUE DELETE NO FURTHER A MYSTERY

I have to fix it speedy as on Friday i am heading for the periodic Test RWC. I don't have any diagnostic system, do you think by eradicating the battery I'm able to reset the error if i will change the adblue injector?Invoice of £644 . I have generally had Peugeot cars and would endorse them to anybody. This 2015 husband or wife tepee allure has b