elitesurfer50 Posted March 26, 2006 Report Share Posted March 26, 2006 sorry if this is not the right catagory to put this in but didnt know were to put it.. the truck threw a code today so i went to auto zone. they said it was my o2 senors.. i got dynatech headers and there cats... i also have a pcm 4 less. i was wondering if maybe the pcm wasnt workin right thats y it threw the code or the o2 sensors r messed. how can i check it to c what one it is? Link to comment Share on other sites More sharing options...
elitesurfer50 Posted March 27, 2006 Author Report Share Posted March 27, 2006 heres what the code reads... P0420 catalyst efficiency below threshold (bank 1) if i bring this into chevy would they fix it dude to after marke headers and exhuast.. there stock o2 sensors so i think they might.. Link to comment Share on other sites More sharing options...
BenKey Posted March 27, 2006 Report Share Posted March 27, 2006 Believe that is a catalyitc converter problem, not O2. Did the fault come back after they cleared it? Link to comment Share on other sites More sharing options...
elitesurfer50 Posted March 27, 2006 Author Report Share Posted March 27, 2006 i didnt have them clear it. but i guess i should c if it does come back... Link to comment Share on other sites More sharing options...
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