FAULT CODE P2004 HELP PLEASE

HELLO EVERYBODY
MY CAR IS 2007 HONDA ACCORD EXECUTIVE 2.2 ICTDI
Anybody can help me to find out what is the P2004 faulty code??!

How much is the coast for replacement part or fix it?
Can i TO replace my self?
Where can i find the wrong part?
What is the car part number?i sould Buy new one ,or can i BUY the used one?

HELLO!

IMRC valve incorrect position... http://www.micro-tronik.com/faultcodes/obdiifaultcode_p2004.html

Try using the TA search facility... this is a common problem.

On yours you can get away sometimes with just replacing the solenoid filter for about £40 instead of the whole IMRC. On the pre facelift you need to change the whole unit