I've got a 2004 2.0 hdi exclusive picasso about a month ago engine warning light came on , then lost power and would only do 20 mph,rac diagnosed EGR unit fault since had replaced , problem sorted for about 10 miles then started again with 2 new warning codes, garage tried solanoids and butterfly clips cant find whats wrong and ideas welcome

paul, April 2011

my c4 had a new turbo fitted now the engine lost power and banging what is it

roy, August 2017

Hi got citreon picasso 2.0 diesel when the car first ups its fine but when the engine has warmed up it lacks in speed ie pick up it does pick up very very slowly with my foot to the floor it's very sluggish had a new egr valve fitted and made no difference any idea what it could be pls.

Martin Anderson, August 2013

Thanks will try that, i read people change the igntion coil at the same time as the egr? is it worth a try

paul, April 2011

Check your air filter and especially the air flow meter. Add engine cleasning agent to full diesel tank to help clean injectors and ports. Rev the engine high while car is stationary and check for black exhaust emission. Replacing the first two and adding the third will cure that. But the air flow regulator is often the culprit in power loss.

Jac, April 2011