Found another thread with this code and it's an elbow under the p/s pump. Sure enough it was gone, and after much trial and tribulation I was able to change it out. Find out soon if it clears my code and gets my mileage up. Thanks again.

Thanks for the great post. I had the same code and didn't know of this particular elbow 'till I saw this thread. Just found mine was bad and after liberal application of foul language and curses to Volvo engineers, was able to effect the change. I would recommend using a needle nose about 12" o...

Well, thanks again. There is a canister under the battery, I'll have to check that a little better for compromised hoses. Appreciate the come back. And thanks Ozark, leaks a hunting we will go.

I don't find a rear canister, though I did find a hose that went to the booster gauge that was disconnected. One elbow that went from under the fuel rail was suspect, so I replaced that. Do you think either of those would cause the fault?

Thanks to you both for a job well done.

Thanks for the tip. Is there a cross reference table available for future use?

I have check engine light on and had a scan done at Autozone. I got two codes but can't find the specific cross reference to Volvo codes. I read the thread containing DTC codes but need to convert OBDII to Volvo. OBD codes are P0440, and P0172. Please and thank you.