LITTLE KNOWN FACTS ABOUT PEUGEOT ADBLUE DELETE.

Since previous diagnostics / code clearing drove three miles and light back on / engine turned off straight away advert blue filler cap removed and attempted to blow/suck by way of cap to see if ventilated. Cap is just not ventilated. remaining cap off and tissue in filler neck for eighty miles/no lights arrived on.No, Pretty much all diesel engine