Check engine light--code indicates, catalyst system right bank underperformance? on 2000 Volvo V40

The check engine light comes on and off about every 5 to 7 days. During the week I only drive 14 mi a day. When I drive on weekend @ interstate speeds, check engine light will go off. When I run the code--it says--catalyst system, right bank, underperformance. What is this? and a estimate of repair would be helpful? car has 185000 miles on it. it gets regular maitenence.

by in Goldsboro, NC on April 04, 2012
1 answer 2 comments
ANSWER by on April 04, 2012
WITH THIS MILEAGE I WOULD SUSPECT THE CATALYTIC CONVERTER IS DONE. CALL AROUND TO LOCAL MUFFLER SHOPS FOR EST AND AVAILIBILTY. YOU MAY HAVE TO PURCHASE FROM THE DEALER. BIG $
COMMENT by on April 04, 2012
I might would agree with you about the mileage, but this is a Volvo, it goes about 300,000 miles before you have problems with it. As i said it has had regular maitenence and required maitenence at times stipulated by Volvo. Also if the cataltic converter is done as you say the OBD-2 system would recognize this and the check engine light would stay on constantly. Repectfully I'll have to disagree with you on your answer, but thanks for trying.
COMMENT by on April 04, 2012
DISAGREE ALL YOU WANT TO BUT WEATHER ITS A VOLVO OR NOT PARTS WERE OUT AND FACTS ARE FACTS. 185K MILES WILL WEAR OUT THE BEST PARTS IN THE WORLD. GOOD LUCK YOU APPARENTLY BELIEVE IN VOLVOS MORE THAN I DO. LOL