Hey
my car - 2010 Honda Accord Coupe V6 Auto
I have p0430 code for almost 2 years now, and also had p0420 since last year. I used spark plug defouler and p0420 code went away but p0430 stayed. Is it Catylitic converter or something else?

Also my car feels like 4 cylinder does not have as much power as a v6 and sometime I feel like accelaration is slowed down and if i do not push on gas pedal and keep feet stable it slowly reduces a speed.

Can someone help what could be wrong?
Thank you