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  #1  
Old 12-06-2014, 10:49 PM
pyramid pyramid is offline
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Default P0430 Code on 2006 Pathfinder

Check Engine Light came on and stayed on for a couple of days.
I took the SUV to the dealer for it to be checked.
The dealer tells me that P0430 Code comes up and that the Bank 2 Catalytic Converter needs to be replaced.

Question 1) Does Bank 2 refer to the front Cat Converters or the rear?
The driver's side or passenger side? ( there are 2 fore & 2 rear)

Question 2) I have read in the forum where some people have been able to solve the problem by replacing the O2 sensor only. What test can be done to further determine if its the sensor and not the converter?
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  #2  
Old 12-07-2014, 06:53 PM
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1. Bank 2 means it's the driver side. (Image here: 1996-2011 Nissan Pathfinder A/F Sensor - O2 Sensor Location | Nissanhelp.com). The catalytic converter that fails is the front one.

2. The only test I know is with an oscilloscope. You can check the graph of the O2 sensor. Problem is that if the cat is not working properly, the signal from the sensor it's not very accurate. It's possible that replacing the sensors may take care of the problem, but it's no common.
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  #3  
Old 12-08-2014, 04:07 PM
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smj999smj smj999smj is offline
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Usually when the oxygen sensor fails, it will set a trouble code. Catalyst efficiency codes can be a little "flakey." You can erase them and all will be fine for a few weeks and then they're back. I think a lot of those people who say they replaced the sensor and fixed the problem actually didn't fix anything so much as the code simply hasn't come back...yet. For this reason, I suggest people erase the code and see if it re-triggers before spending a lot of money to replace the catalytic converter. If the catalyst efficiency code returns without any other code(s), it's likely the converter is bad (assuming there are no exhaust leaks). The upstream converters are the only ones that are monitored for efficiency by the ECM. In a way, they also sort of act like a filter for the rear converters, so it's rare to see the rear cats fail.
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Old 12-08-2014, 06:53 PM
pyramid pyramid is offline
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Default P0430 Code on 2006 Pathfinder

Thanks for responding to my questions. I now have a little more understanding of what needs to be done, namely replacing the bank 2 Catalytic Converter (front driver side)

Can you refer me to a website that I can purchase the converter & gaskets to replace the defective one? The price for the genuine Nissan converter is way too expensive. (I have got 146,000 miles on my pathfinder, first owner)
I have been referred to a mechanic that will carry out the replacement once I provide him with the parts.
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  #5  
Old 12-09-2014, 01:30 PM
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If you live in California, or live in NY state and have a CA emission certified vehicle, or another state that is CARB compliant, you likely have no other choice to go with genuine Nissan. Otherwise, I would go with a Bosal or Walker direct-fit converter. I deal with Rockauto.com a lot, so I would try there. If you do a Google-search for "Rockauto discount code," you will be able to find a number of hits where you can get a 5% off code. Just copy it into the box labeled "How did you here about us?" on the checkout page. One note, the front left catalytic converter is no fun to replace!
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Old 12-10-2014, 06:26 AM
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Thanks for the information provided smj999smj. I will take into consideration your advise (I am located in Florida). I have an appointment with a Muffler Shop to take a look at replacing the converter with my supplied replacement.
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  #7  
Old 12-20-2019, 04:40 PM
Robert G 101 Robert G 101 is offline
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Thank you for clarifying the point that the front cats act like a filter for the rear cats, it's a good starting point to understand what parts should be addressed first.
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  #8  
Old 12-20-2019, 04:45 PM
Robert G 101 Robert G 101 is offline
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Default Would you replace both front cats at the same time due to equal wear and tear?

Quote:
Originally Posted by smj999smj View Post
Usually when the oxygen sensor fails, it will set a trouble code. Catalyst efficiency codes can be a little "flakey." You can erase them and all will be fine for a few weeks and then they're back. I think a lot of those people who say they replaced the sensor and fixed the problem actually didn't fix anything so much as the code simply hasn't come back...yet. For this reason, I suggest people erase the code and see if it re-triggers before spending a lot of money to replace the catalytic converter. If the catalyst efficiency code returns without any other code(s), it's likely the converter is bad (assuming there are no exhaust leaks). The upstream converters are the only ones that are monitored for efficiency by the ECM. In a way, they also sort of act like a filter for the rear converters, so it's rare to see the rear cats fail.
Would you change both front cats at the same time due to equal wear and tear, it would seem to me that if one went then the other in't too far behind. Thank you for all your help, Robert.
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  #9  
Old 12-24-2019, 02:41 PM
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I would just replace the one that's bad. It's not like a wheel bearing that has moving parts. Plus, they aren't cheap!
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  #10  
Old 12-24-2019, 02:49 PM
Robert G 101 Robert G 101 is offline
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Default I am getting this code and not sure if it's a 02 Sensor or...

P0430 Code on 2006 Pathfinder-80316784_2582872751993695_4433002481126998016_n-jpg

P0430 Code on 2006 Pathfinder-79921876_487375521892361_1667262216467906560_n-jpg
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