Here is where Google is your friend! When you search try, "P0448 volvo v70r" or "1998 volvo v70r P0245".
That said, looks like you have a EVAP issue, probably the J hose, you have a SAS issue, and some issue with your TCV ( I think you mentioned something about your TCV in another post). Now, if you search those codes like I suggested, you'll find some common fixes for them! Good Luck!