A SECRET WEAPON FOR PEUGEOT ADBLUE DELETE

Due to the fact final diagnostics / code clearing drove 3 miles and lightweight back on / engine turned off straight absent advert blue filler cap eradicated and attempted to blow/suck via cap to find out if ventilated. Cap isn't ventilated. left cap off and tissue in filler neck for eighty miles/no lights arrived on.drove 3 miles and light again o