Tommymc

Hi all I have recently bought a 2017 skoda Octavia estate 1.6l tdi. The engine management light has came on and when i checked it out the fault code that appeared was p2000 specifically, the NOx trap has efficiency that is below threshold for Bank 1. I have also noticed that fairly often the fan keeps running for about 5 mins when the car has just been switched off. I have got the Dpf checked and it is performing fine. I have also noticed that the MPG is very bad at 38mpg. The o2 sensor behind the cat has also been replaced. All sensors have been took out and cleaned. The odd time i get a smell of fuel/fumes in the cabin and i have noticed the car was a bit smokie the other day just after starting it. Has anyone experienced anything similar ? Any help would be appreciated thanks.