The car passes at the 25 mph reading,but not at 15 mph in Ca smog test. All three sections are elevated. It also failed the evaporative test. I'm going to call Volvo about the recall on leaking fuel system on 1995 850's. I was told the O2 sensor was recently replaced,and it looked fairly new visually. The readings were: HC-measured 73 - Max-59, CO-measure .55 - max-.34, NO-measure 642 - max-484. Any suggestions?