NOT KNOWN FACTUAL STATEMENTS ABOUT PEUGEOT ADBLUE DELETE

Given that last diagnostics / code clearing drove 3 miles and lightweight again on / engine turned off straight away ad blue filler cap eradicated and tried to blow/suck by way of cap to discover if ventilated. Cap is NOT ventilated. still left cap off and tissue in filler neck for eighty miles/no lights arrived on.0333 figures cost two.5p for ever