P0420 and P0430 Code

This worked for me. If the cats aren't completely gone it will likely work. Eventually you will need to replace them though.

 

So is cat clean like a fuel system treatment then?

 

Yes you run it through the tank. I wasn't getting a bad catalyst code actually, but my catalyst monitors were not setting no matter how many miles I drove likely because they are on their way out. I ran the cataclean and they set to green within a half tank of driving or so and I was able to take it in and get smogged

 

Gotcha

 

Use an anti fouler on both sides for the sensor.

I’m either gonna buy a used set

use a anti fouler on both sides and gut the cats

or buy these and hope they don’t check which usually they don’t