THE BEST SIDE OF PEUGEOT ADBLUE DELETE

Considering the fact that previous diagnostics / code clearing drove 3 miles and light-weight back on / engine turned off straight away advert blue filler cap eradicated and attempted to blow/suck through cap to see if ventilated. Cap isn't ventilated. left cap off and tissue in filler neck for eighty miles/no lights arrived on.When you buy by way