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Second opinion] P0430 on 04 XTerra. Could it just be the O2…

Second opinion] P0430 on...

Second opinion] P0430 on 04 XTerra. Could it just be the O2 sensor, or is it definitely the converter. Also P0420 pending...

Mechanic's Assistant: Have you located all of the vehicle's oxygen sensors? Are the wires leading to and from each intact and in good shape?

Yes

Mechanic's Assistant: Are you fixing your Xterra yourself? What have you tried so far?

Yes I am. Just getting started and don't have much $$$

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Answered in 1 hour by:
4/22/2018
rpmdiag
rpmdiag, Tech and Instructor
Category: Car
Satisfied Customers: 9,122
Experience: Since 1975
Verified

Hello, my name is ***** ***** to Just Answer! I will be assisting you with your questions today. Give me one moment while I review this.

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If the O2 sensors have been confirmed good with a LAB scope, then the CAT is bad. Very easy test to confirm it.

Please understand that I don't know your skill level or tools
you have to assist us. Also understand that I can't see, smell,
hear, or touch the vehicle either, so your patience is
appreciated. JA is a great Q/A site, but it does not replace a
repair shop. So please don’t shoot the messenger if I have to
deliver bad news:)
pops up. I don’t get credit for helping you until
you rate me

Thanks, Ron

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Customer reply replied 4 months ago
ok

Thanks, ***** ***** remember to rate me 5 stars now and keep this link in case you need me again later on.

I don't get credit for assisting you unless you rate me:)

Ron

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Customer reply replied 4 months ago
Am I missing something? I don't see ANY answer

Yes, look up a couple steps.

If the O2 sensors check good with a scope, then the CAT is bad.

Thanks again,

Ron

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Are we good now?

I read your first post and this one. When you ask for a second opinion, that doesn't mean that one expert works for free. It was your choice to ask for a second opinion. I actually gave you more and better information, because you can have a defective O2 sensor causing this.That code is NOT conclusive to being a bad CAT.

Thanks again, Ron

rpmdiag
rpmdiag, Tech and Instructor
Category: Car
Satisfied Customers: 9,122
Experience: Since 1975
Verified
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