DEF Warning but Def tank is full

[blackpassat]

HI, bought 2014 Passat TDI on March 13th with 55k but right after 12 days of purchase and almost 500 miles of driving the DEF warning sign appears with 200 miles of remaining miles to go but the DEF tank is full with the liquid. Needs help and advice.

 

[scooperhsd]

Take it to dealer.

 

[Lightflyer1]

Should be covered under the Extended Emissions Warranty and is a known issue. Requires replacement of the adblue system/tank/heater setup usually.