P0430

[Nightarmorpro4]

Hello all my xterra is currently at 107k and a p0430 I’m gonna swap the sensors to make sure the cat is bad and was planning on replacing both with Walker or O.E and wanted some insight on both and other possibilities as far as that code goes.
TIA

 

[RamblinRover]

In my experience it is usually a cat issue with these codes but..... I'll give you the book answer now. As far as the O2 sensors I've had very little issues with aftermarket sensors. There are some parts I demand OE but this is not one of them.

 

[ekaphoto]

Before you do that have you changed spark plugs?

Had the same issue with my 06 frontier and plug change solved it. At 107k it is time anyway. Also get the oem plugs from ngk.

 

[Nightarmorpro4]

Before you do that have you changed spark plugs?

Had the same issue with my 06 frontier and plug change solved it. At 107k it is time anyway. Also get the oem plugs from ngk.

I ended up changing the cats to ones from 1-800-radiator and the spark plugs were changed 1-2k miles before

 

[westslope]

Stylized facts as I understand them:

1. Downstream 02 sensors rarely fail.

2. Downstream 02 sensors should always be replaced when the primary catalytic converters are replaced.