The Check Engine light of my 2005 S60 5T, 153k miles, came on. Two days later it sounded like a Diesel in Idle, after about 5 minutes. Diesel ticking/knocking disappears when RPM goes up.
Sound comes from the area marked in the attached photo.
Went to my repair shop and they found codes:

ECM-6140 -- Camshaft control exhaust -- Slow
ECM-611B -- Camshaft control, intake. Faulty

Repair shop says that some gears (?) the timing belt runs over are wearing out - I guess they refer to some tensioners etc?
Will bring it in to them for checking and estimate in a week.

Does this sound familiar to some? How big of a repair is that?

Thanks!

 

Did you find out what was wrong with it ?

 

There were several things going on at that time.
The ticking noise was from oil sludge. Did an oil change with engine flush and all was good.

 

And the codes for the camshaft position sensor I have the same ones and thanks for the info