206 hdi help for my car problem

Hi friends, I have a situation that has been going on for 1 month. If I have information in my car or I want help if I have access to the press. Don't go, no problem going and I have been using my vehicle for 3 years. I did not know this sign, but I have changed the diesel oil filter for the last 1 month.

http://forum.peugeotturkey.com/forum_posts.asp?tıd=8265