So my Sky is at 100,000 and just indicated code P0420 "Catalyst System Efficiency Below Threshold Bank 1". I have not noticed any change in how the engine runs, its not idling rough or sputtering under acceleration; however, I have noticed a significant loss of power when putting the peddle down. It just seems really week, i can barely spin tires anymore. Can a plugged catalytic converter really cause that much loss? Whats the best way to resolve this issue? I was told to try a product called "Cataclean" mixed in with my fuel. Id honestly be fine with just removing the converter all together and leaving the pipe wide open if that would fix it, and I'd imagine it would give me more power than stock without it. I've read the skyforums and looks like its either the converter or the O2 sensor. I have the 2.4 baseline with a 16664 Magnaflow 2.5 quad tip exhaust installed. Any thoughts?