Login  |  Register
Nissanhelp.com - All About Nissan
Do-It-Yourself Maintenance Owners Manuals Recalls/Campaigns Service Bulletins Service Manuals Nissan OBDII Codes Glossary & Acronyms More...
Member's Ride Photos Stock Photo Gallery
Classifieds - For Sale Classifieds - Wanted To Buy Classifieds - Mechanic Wanted Classifieds - Auto Services Search Auto Parts
Register FAQ Social Groups Mark Forums Read
info on p0420/p0430 codes Forums > > info on p0420/p0430 codes info on p0420/p0430 codes
Forgot Password? Join Us!


Pathfinder Nissan Pathfinder Discussion Forum

Reply
 
Thread Tools Display Modes
  #1  
Old 12-18-2011, 03:28 PM
ctalford ctalford is offline
Registered User
2005 Pathfinder
 
Join Date: Dec 2011
Posts: 4
Default info on p0420/p0430 codes

I have a 05 Pathfinder SE and I'm getting the p0420/p0430 codes. I spoke to a friend who is a mechanic about these and he said that I need all four cats replaced. I thought I had read someplace that only the rear cats needed replaced when these codes came up. Can anyone confirm or deny this? Also, if all four need to be replaced can anyone recommend a good site to buy them from.. Feel free to pm or respond directly here.

Thanks

C
Reply With Quote
  #2  
Old 12-19-2011, 01:26 AM
bennyb53's Avatar
bennyb53 bennyb53 is offline
Moderator
2019 Sentra
2002 Altima
 
Join Date: Jan 2011
Location: Hawaii
Posts: 2,105
Default

Verify with your friend again. Your vehicle does not have 4 catalytic converters. But it does have 4 Oxygen sensors.

OBDII Code P0420 - Catalyst System Efficiency Below Threshold Bank 1 | Nissanhelp.com. Bank 1 refers to cylinder 1. So locate where cyl. 1 side exhaust that leads to your Cat.

OBDII Code P0430 - Catalyst System Efficiency Below Threshold Bank 2 | Nissanhelp.com. Bank 2 refers to Cyl. 2 opposite side of Cyl. 1.

There are numerous threads on here from owners reporting the same codes. Some are fortunate enough that replacing the 02 sensors solved the issue. Some are not as lucky as they have to replace their catalytic converters. Have your cat tested. If your car has 100k miles or more and 02 sensors have not been replaced, now is the time to do so. Hope this helps.
Reply With Quote
  #3  
Old 12-19-2011, 03:03 AM
ctalford ctalford is offline
Registered User
2005 Pathfinder
 
Join Date: Dec 2011
Posts: 4
Default

Benny,

Thank you very much.. My friend isn't a nissan mechanic but I wanted to run it by him anyway. I do have over 100K and I changed the rear O2's and the ses light came back on. I have the front o2 sensors, just need to get them in.

Last edited by ctalford; 12-20-2011 at 12:16 AM.
Reply With Quote
  #4  
Old 12-19-2011, 03:58 PM
streamcast streamcast is offline
Master Enthusiast
1997 Altima
1995 Sentra
1995 Nissan sentra
 
Join Date: Jan 2009
Location: CANADA
Age: 53
Posts: 1,214
Default

I would check ecm grounds, remove the frt sensors in the convertors and look inside to see if the cat is deteriorated or missing, also you maybe able to compare sensor readings of the exhaust with diagnostic tool
Reply With Quote
  #5  
Old 01-07-2012, 03:45 PM
djofraleigh
Guest
 
Posts: n/a
Default why buy four when one or two will do?

[QUOTE=ctalford;74165]I have a 05 Pathfinder SE and I'm getting the p0420/p0430 codes. I spoke to a friend who is a mechanic about these and he said that I need all four cats replaced. I thought I had read someplace that only the rear cats needed replaced when these codes came up.

GET MORE ADVICE. I have a 2002, and only the front two cats have sensors. why replace the rear ones at all? Intake air leaks MIGHT be the cause of my bank 1 code problem, and if so, I don't want to replace the expensive converter.
Reply With Quote
  #6  
Old 01-07-2012, 04:44 PM
fjp326 fjp326 is offline
Registered User
2006 Pathfinder
2006 Pathfinder
 
Join Date: Jul 2011
Location: NY
Posts: 10
Default

Had the same problem. It's the front two cats. All four o2 sensors are upstream from the rear cats. I replaced the o2 sensors while we had the cats out. Good luck.
Reply With Quote
  #7  
Old 01-10-2012, 02:16 AM
ctalford ctalford is offline
Registered User
2005 Pathfinder
 
Join Date: Dec 2011
Posts: 4
Default

Thanks for the help all. I needed the new cats and o2's. Also needed a vent control valve. Unfortunately, mechanic went to the dealership to get the cats. I had the front o2's and valve.
Reply With Quote
  #8  
Old 01-11-2012, 09:50 AM
SeanW SeanW is offline
Registered User
2006 Pathfinder
2005 Altima
 
Join Date: Jul 2010
Posts: 16
Default

Ouch at getting them from the dealer. Courtesy lists them at $530/ea with a $140 core charge. I just bought Walker Exhaust Direct Fit replacement cats for $90/ea from Rock Auto. I figure even at that price I can replace them 4 times if they rust out, before I get to the cost of OE replacements. I am waiting on the gaskets, hardware, O2 sensors, and a warm day before I put them on.
Reply With Quote
  #9  
Old 01-11-2012, 10:14 AM
fjp326 fjp326 is offline
Registered User
2006 Pathfinder
2006 Pathfinder
 
Join Date: Jul 2011
Location: NY
Posts: 10
Default

Quote:
Originally Posted by SeanW View Post
Ouch at getting them from the dealer. Courtesy lists them at $530/ea with a $140 core charge. I just bought Walker Exhaust Direct Fit replacement cats for $90/ea from Rock Auto. I figure even at that price I can replace them 4 times if they rust out, before I get to the cost of OE replacements. I am waiting on the gaskets, hardware, O2 sensors, and a warm day before I put them on.
I wanted to use these myself but the walker cats pictured are the rear ones. I didn't know if the pictured the wrong cats or walker only makes the back ones. I wound up using Eastern Catalytic. They came with all the gaskets. Also replaced all 4 o2 sensors with Bosch sensors from Rock Auto. Been about 5 months now, so far so good.
Reply With Quote
  #10  
Old 03-19-2018, 08:19 PM
Johann84 Johann84 is offline
Registered User
2006 Pathfinder
 
Join Date: Mar 2018
Posts: 2
Default

Hi everyone, I have a 2006 Nissan Pathfinder with 130,465 miles on, just replaced the cats and censors since the check engine came on with codes PO0430 & PO0420, after doing this the check engine light still on , what else can I do to get it to go away, need to pass the smog check.



Can someone please provide assistance.
Reply With Quote
  #11  
Old 03-25-2018, 05:48 PM
smj999smj's Avatar
smj999smj smj999smj is offline
Master Enthusiast
2006 Pathfinder
2003 Frontier King Cab
2003 Frontier KC SVE 4x4
 
Join Date: Jun 2012
Location: Prospect, VA
Posts: 1,866
Default

Try erasing the codes and then erasing the ECM self-learning memory and see if the codes return before doing anything else. Also make sure there are no exhaust leaks and the engine is not running too rich or too lean. Having a scan tool to observe the long-term fuel trim would be beneficial to diagnosing the problem. Also, make sure your spark plugs are not overdue for replacement; they should have been replaced at 105,000 miles.
Reply With Quote
  #12  
Old 03-26-2018, 07:10 PM
Johann84 Johann84 is offline
Registered User
2006 Pathfinder
 
Join Date: Mar 2018
Posts: 2
Default

Thank you, will look in to it.
Reply With Quote
Reply

Tags
codes, info, p0420 or p0430

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 05:20 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO v2.0.42 (Pro) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.