Hey guys. I was wondering if you could help me out with a scan code. I had a "service engine soon" light come on. So, I scanned it and the code came up as: PO420 catalyst system efficiency below threshold (bank1). I think it has to do with the catalytic converter, but I'm not exactly sure.

To replace what you're talking about is pretty pricey... i'd try changing the 02 sensors and see if it fixes it.