FIXED!! If you get the P0420 for catayist Bank 1 or 2

[johnboneske]

I read to "fix" it, get a set pf Anti-fouling spark plug holders...

I got a set of Dorman 42009 18MM Anti foulers(they come in a pack of 2), I drilled one of them out with a 1/2 inch drill bit, and installed the O2 sensor in it, then inserted it, into the one I didnt drill out(tightened all 3 pieces together). Installed that into the exhaust, tightened it up, plugged back in the O2 sensor, which in my opinion was the HARDEST part since there is no room above the trans to unplug/plug back in the harness. So far its been over 200 miles and havent gotten my CEL light back.

 

[Fred Valdez]

I did something like this with my Hemi Dodge Ram...when I hollowed out the cats, to prevent the cats from setting off codes I used 2 plug foulers, drilled out the upper one and stuffed steel wool in it before screwing the o2 sensor onto it...