FACTS ABOUT PEUGEOT ADBLUE DELETE REVEALED

Because last diagnostics / code clearing drove 3 miles and lightweight again on / engine turned off straight away ad blue filler cap taken out and attempted to blow/suck by means of cap to check out if ventilated. Cap will not be ventilated. still left cap off and tissue in filler neck for 80 miles/no lights arrived on.drove three miles and lightwe