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
04 Altima check engine light and codes Forums > > 04 Altima check engine light and codes 04 Altima check engine light and codes
Forgot Password? Join Us!


Altima Nissan Altima Sedan Discussion Forum

Reply
 
Thread Tools Display Modes
  #1  
Old 09-08-2015, 05:53 AM
creel228 creel228 is offline
Registered User
2004 Altima Sedan
 
Join Date: Jul 2015
Posts: 13
Default 04 Altima check engine light and codes

A little history, just replaced the catalytic converter, exhaust manifold, and O2 sensor on my 04 Altima with a 4 cylinder. The check engine light went off for one day then came back on. I just got someone to check the code and it is P1274 Air fuel sensor 1 heater bank one. Also P0171 bank one system too lean.

Can someone help me with these? Will this have anything to do with the parts I just replaced? If not how hard will this be to fix. Thanks
Reply With Quote
  #2  
Old 09-08-2015, 09:54 PM
bennyb53's Avatar
bennyb53 bennyb53 is offline
Moderator
2019 Sentra
2002 Altima
 
Join Date: Jan 2011
Location: Hawaii
Posts: 2,105
Default

You've replaced your CAT go ahead replace your Air/Fuel sensor. I recommend do both Pre-cat and post cat. Very easy to replace. But you need to do it when engine is cool to the touch as you will need to remove the heat shield. You will also need the oxygen sensor socket ( I think 21mm size) and 1/2 inch socket wrench that's it.
Reply With Quote
  #3  
Old 09-09-2015, 03:05 AM
creel228 creel228 is offline
Registered User
2004 Altima Sedan
 
Join Date: Jul 2015
Posts: 13
Default Reply

I did replace the upstream sensor while I was replacing the converter and manifold.
Reply With Quote
  #4  
Old 09-10-2015, 05:38 PM
RChurch RChurch is offline
Registered User
2007 Versa
2002 Altima Sedan
2007 Versa
 
Join Date: Mar 2015
Posts: 4
Default P1274

Check your wiring to/at connector of upstream o2(air/fuel sensor). If it's showing heater circuit (P1274), get a voltmeter and confirm you're getting volts at the wire for the heater circuit at the o2 sensor connector. Could be you got a defective(dropped) o2. What brand did you purchase? I haven't heard of Nissans being finicky with brands of o2's like Toyota. P0171 could be a vacuum leak, weak fuel pump, plugged injector, etc. Did you have the code before you replaced the manifold/cat.?
Reply With Quote
Reply

Tags
altima, check, codes, engine, light

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 04:21 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.