2006 XC90 D5 auto awd
 

Hi everybody,
Great to be on the forum, can somebody please maybe help me with a problem on my xc90 D5..?
It gets a airlog in or at the diesel filter, then car won't start until i open up the little srew at the bottom of the filter and let some siesel run out. Then the car starts and goes, but, on the dashboard the little red triangle is on and in the messagebox it says, "system service required urgent", but tben after a while the red triangle and the message dissapears until tbe next time. Another guy told me the cam sensor needs to be replaced, done that, problem still there... .
Can someone please help me