i have anti-pollution fault light on dash computer my citroen c5 will not let me go over 2 revs any ideas why? if i do engine still goes but will not accelerate but i turn ignition off then back on & it goes ok again but still have to keep under 2 revs, had erg valve & high speed fuel pump replaced 12 months ago

mazz, February 2010

sounds like your particle filter in your exhaust might be blocked.Not 100% sure on Citroen same symptoms on Peugeot there is a pressure sensor before and after the cat measures exhaust pressure if cats blocked with soot you get hi reading before the cat usually.causes anti polution message hope this helps.

Ryan., March 2010