how can i fix my depollution system fault? peugeot 207 sport?

You could always try a Google search fo ryourself.

These are typical results:

http://www.peugeotforums.com/forums/307-38/depollution-system-faulty-54818/

http://www.peugeotcentral.co.uk/ftopic-2035.html

http://www.honestjohn.co.uk/forum/post/index.htm?t=100251

http://www.roadtestreports.co.uk/qanda/72861/

Key seems to be to get the codes read and think on from there.

XXX
January 2016