206 HDI antipollution fault warning

I get an antipollution fault error on my vehicle, the vehicle does not exceed 3000 cycles, the traction is falling, it does not happen when it is cold.

It is probably related to fuel.

First of all, welcome to us. bad fuel - clogged filters - floor - electrovan - turbo - injectors etc. If you are a little more explanatory, do you have smoke - oil aging - water reduction - etc.

It seems to me like the engine oil cooler problem?

Thank you Smoke throwing oil reduction water no water reduction only I get the warning the vehicle is dropping from the hammer. It does not exceed 3000 cycles.

Periodic maintenance was carried out 7000 km ago