p0420

A few months ago, my check engine light popped on, and started spitting a 420 code, and later a 430 code. According to my scanner, it means something might be up with the left and right bank catalytic converters. I haven't noticed any actual change in the vehicle's performance, engine behavior...

So while driving home today after a family reunion :ohyeah: the check engine light came on. I checked the code and it was a p0420. After a little searching it appears to be "420 The catalyst seems inefficient (#1)". Has anyone else had this code? I guess I could use this as a reason...