hi everybody, does anybody know what this code means. Just went to autozone and they pulled the code P0420 Catalyst System Efficiency Below Threshold (Bank 1). Thank you all in advance. E

 

if you have under 80k miles then take it to nissan. its covered under a 8yr/80k federally mandated warranty. they will reflash the ecu which cures it in most cases and if not they will end up having to replace the main cat. this should be at no charge if you are under 80k.

 

Thanks sloppymax, I just called my nissan dealer and they told me that they have do to their own diagnostic, which of course will my expense at almost $90. Do I have to pay this or are they trying to hose me down. Another question my max is calif. emmision will it be under the same warranty. Thank you all.

 

I just had this happed like to months ago, U don't have to pay the
90 bucks if the diagnostics reads somehting covered by warranty
since u already know the code, that 0420 is covered so they will waive it off they'll tell u after the run the diagnostic.
What ****ed me off is that they failed to tell me that. The Dealer made it seem like i would have to pay .I had to call Nissan's customer service and they explained it to me.GOod luck!

 

I have the same code and I'm bringing it in to for service tomrrow.

 

Yep... same code turned on right after i rolled over 78k. so maybe ill take it to the dealer. but hell a performance Cat would be fun... any one know exactly what this code means???? is it jsut the cat. isnt working well enough?

 

you can find the actual tsb explaining P0420 here third one down from the top with credit going to studman for hosting them.