Anti pollution faulty, what is the reason

[Hash75]

Hi
I have Peugeot 307 model 2006
The following error appears on the screen:
(Anti pollution faulty)
The car's speed does not exceed 30 km What is the reason, in your opinion, with thanks to the experts?

[GiveMeABreak]

Petrol? Diesel?

Does it have a particle filter? If not sure post your VIN up.