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P0420 and P0430-  Not Cats or O2 sensors Forums > > P0420 and P0430-  Not Cats or O2 sensors P0420 and P0430- Not Cats or O2 sensors
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  #1  
Old 03-15-2018, 12:25 PM
SpencerC SpencerC is offline
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2006 2006 Pathfinder
 
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Default P0420 and P0430- Not Cats or O2 sensors

I just replaced all 4 cats and all 4 O2 sensors last night. Took it for a test drive and P0420 came on. Reset it and went to bed, today I drove it to work and get P0430.

What direction do I go next? I have got the most expensive things out of the way, but it didn't solve the problem. Suggestions?


This is on a 2006 Pathfinder

Last edited by SpencerC; 03-15-2018 at 12:25 PM. Reason: adding model
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Old 03-15-2018, 03:35 PM
SpencerC SpencerC is offline
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Now its Pa420. but neither the 420 or the 430 came on and everything shows complete.
Im confused
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  #3  
Old 03-15-2018, 06:14 PM
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smj999smj smj999smj is offline
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When replacing air/fuel ratio sensors in Nissans (the front oxygen sensors), you should erase the self-learning memory after installation and erasing the trouble codes.
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Old 03-16-2018, 06:38 AM
SpencerC SpencerC is offline
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Quote:
Originally Posted by smj999smj View Post
When replacing air/fuel ratio sensors in Nissans (the front oxygen sensors), you should erase the self-learning memory after installation and erasing the trouble codes.

that is something other than the engine codes? How do I reset it? Take it to a dealer?
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Old 03-16-2018, 09:22 AM
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Quote:
Originally Posted by SpencerC View Post
that is something other than the engine codes? How do I reset it? Take it to a dealer?
1998-2012 Nissan Pathfinder Clear Mixture Ratio Self-Learning Control Data

Instruction here: https://www.nissanhelp.com/diy/pathf...f_learning.php
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