Okay so my 97' Accord EX is throwing the code P0420. I have done some searching through the forum and I am not really sure what to do. Since this is the only code that is showing up can the O2 sensors be ruled out or could they be a problem. How do I easily find out whether or not to replace the converter. Any help would be appreciated. Thanks

 

No ideas?

 

either o2 sensor or catalytic converter