PEUGEOT ADBLUE DELETE FOR DUMMIES

Given that final diagnostics / code clearing drove 3 miles and light-weight back on / engine turned off straight absent ad blue filler cap eradicated and tried to blow/suck as a result of cap to find out if ventilated. Cap is just not ventilated. left cap off and tissue in filler neck for 80 miles/no lights came on.On this unique product the GT Lin