Just take it in to the dealer and show them the code and like above post if it is your cats they have to replace for free if you have less than 100,000 miles or 6 or 8 years.
Most muffler shops just want your money for new cats and they won't tell you that you can get it done for free at the dealer. Had them replaced on my dodge ram with 75,000 miles on it for free.
2006 BB R/T, Boss 334's Demolded, Some Debadging, Homemade CAI, Magnaflow Exhaust, Smoke Sidemarkers,
Honeycomb Insert, PD grill,BT Pink Thingy, BT Catch Can, Danko front spoiler, Razors Edge subframe connectors