I just bought a 2005 KIA Sedona with about 103000 miles. After driving it for a bit the check engine light came on. I ran it and got a code P0430 Catalyst Efficiency Below Threshold Bank 2. Of course this popped up just as I was about to get the van inspected. I cleared the code but failed inspection (I'm in NY) because it showed the sensors weren't ready. I know I have work to get done to pass but how much? What Cat would this be? Front driver, front passenger, back? Could it be a different part? How much should the part (or parts) be? I don't want to get screwed by the mechanic when I go. I just want to be prepared with as much info as possible. Any help would be greatly appreciated.