BlackSS04 Posted May 13, 2008 Report Share Posted May 13, 2008 (edited) i have had the code P0420 for a while now, and i came to the conclusion it is either the drivers side o2 sensor or the drivers side cat. i want to switch the o2 sensors around to see if the drivers side one is faulty, but don't know how to do this. if the code still persists after i did that, then i will have the cats checked. so how does one do this ? edit: nevermind, all i had to do was go under the truck and look ya, i'm lazy Edited May 13, 2008 by BlackSS04 (see edit history) Quote Link to comment Share on other sites More sharing options...
smoke03 Posted May 13, 2008 Report Share Posted May 13, 2008 well you could have used the search button but I think it would have been easier to just look under the truck rather than digging through all the threads lol Quote Link to comment Share on other sites More sharing options...
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