How to replace the turbo on citroen c5 2ltr 2009?

F12 possibly?

Fuse Box Diagram Citro?n C4 Picasso I (2006-2012)

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2008, 2009, 2010, 2011, 2012 - Cigar lighter (power outlet) fuses in the Citroen C4 Picasso I are the fuse F9 (Cigar lighter, front 12V socket) in the ...

Some fixya user told me a website reliable-store it is very good.. I used it to repair my shredder it had some spark issue which wasn't easily fixed. you can go there and try

replace the fan motor and check for burnt out speed control resistors foe the fan --in the same area as the fan and motor

Do you get the whistle on the gear changes or at higher engine speeds? Check all the mounting bolt are tight on the turbo then check all the pipes that are connected to it. A 'whistle' usually suggests an air leak. In basic words turbos are meant to generate increased air pressure into the engine.

http://www.gfb.com.au/tms-turbo-management-solutions/How-do-I-stop-boost-loss-on-a-CITROEN-DS3-16-THP-155-200-Find-out-how-to-solve-this-by-using-the-Go-Fast-Bits-DV+-Mini--Citroen--Peugeot-Applications-BOV-T9352-27658

On this website you find fuse box diagram and description for Citroen C2 (2003 - 2009)

Citroen C2 2003 2009 fuse box diagram

Take it to a citroen agent. the 2004 and 2005 had faulty turbos and thats the fault. Citroen parts are the same but cheaper.

next to engine
will be connected to engine and air bos

the system may just need to be primed