A SIMPLE KEY FOR PEUGEOT ADBLUE DELETE UNVEILED

Considering that previous diagnostics / code clearing drove 3 miles and light back again on / engine turned off straight away advertisement blue filler cap taken out and attempted to blow/suck by way of cap to determine if ventilated. Cap is NOT ventilated. left cap off and tissue in filler neck for 80 miles/no lights arrived on.No, Virtually all d