P0420 code came up today any way it could be an o2 sensor and not having to replace the cats? Also wondering about these wheel speed and pulser codes not related to p0420

 

P0420can mean the engine is running rich did you check the oxy sensor output -look at the graphical output not the codes. I used a bluedriver for mine. I would also check every single vaccum hose for integrity a component can fail or be marginal without throwing a code left too long if the condition is rich will damage the catalytic converter Could also be the map sensor if you can get another map sensor and switch them see if the code goes away also those cars do not like regular gas premium only