I have changed everything the code recommends. New plugs, new air filter, new o2 sensor, and cat. I have one question does it have to be a specific o2 sensor? I bought a cheap direct fit at autozone, but do different sensors matter.

 

anyone have any ideas? Does the 2003 accord have to have a wideband sensor for the bank 1 or can it be a 02 narrow band sensor?

 

I have the same code. I repla ed the a/f sensor and the same code came back on along with the p0420 code for a bad cat.