Engine Malfunction Lamp

Hello friends, I have a 2009 model peugeot 407 model vehicle. " Depollution System Faulty " is on the screen and the engine malfunction lamp is on and on and off. I showed it to a master, the air flow meter needs to change. I would be glad if he writes a comment about this subject.
okan2327 2015-01-12 15:46:00

trouble warning in exhaust emission when the vehicle is overloaded or in places with low air pressure, the catalyst is blocked lastly.