Login  |  Register
Nissanhelp.com - All About Nissan
2018 Altima 2018 Armada 2018 Frontier 2018 GTR 2018 LEAF 2018 Maxima 2018 Murano 2018 NV 2018 Pathfinder 2018 Rogue 2018 Sentra 2018 Titan XD 2018 Versa Note 2018 Versa Sedan 2018 Z
MyNissan Do-It-Yourself Maintenance Owners Manuals Recalls/Campaigns Service Bulletins Service Manuals Tech Challenge Game Nissan OBDII Codes Glossary & Acronyms Cost Estimator 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
Forums > > 2000 Altima P0325 P0420 Knock sensor
Forgot Password? Join Us!

Altima Nissan Altima Sedan Discussion Forum

User Tag List

Thread Tools Display Modes
Old 07-19-2009, 08:28 AM
rheavy2's Avatar
rheavy2 rheavy2 is offline
Registered User
2000 Altima
Join Date: Jul 2009
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Default 2000 Altima P0325 P0420 Knock sensor

I've pulled P0325 (knock sensor) and P0420 (catalytic converter) on an inspection test and don't know the best to fix without just replacing things randomly. The knock sensor is next to the oil filter and looks very accessible from the bottom but most suggestions online say to pull off the intake manifold from the top, a much longer job.

Can the knock sensor be replaced from the bottom (or are the illustrations just illusionary)?

Any ideas what the two codes mean together or any suggestions on how to diagnose?

The inspection guy recommended to clear up the EGR first just in case since it's easy.

Also it had the same condition last year for a few months and then then it went away by itself. It's been a few months now this year and it's still on...

Reply With Quote
Old 10-23-2010, 07:44 PM
dejohnny's Avatar
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)

Does anybody have something to say about this? I have the same trouble. HELP!
Reply With Quote
Old 11-17-2010, 07:10 PM
crabby1's Avatar
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)

I know very little about cars but am learning more than I wanted to trying to get my 96 started. From talking to parts dealers and mechanics, most seem to feel that the knock sensor is a waste of time and money (what I heard - not what I know directly). Also heard it is difficult to get to (from top) and may fry soon after it is replaced. A Nissan mechanic would be the best source to verify if this is true. My knock sensor has been bad for at least a year. No one who has heard this is concerned. Emissions testing facilities will tell you the code is present but in IL this will not cause an emissions test failure. It won't turn on the check engine light.

The p0420 code will cause an emissions test failure. The EC document posted in the documents link for the 1996 Altima indicates the following can cause the error: three way catalyst, exhaust tube, intake air leak, injectors, and injector leak. There is a procedure listed to check the three way catalyst. A more detailed discussion is here: http://repairpal.com/OBD-II-Code-P0420 If you don't have diagnostic equipment, it sounds like the easiest and quickest test would be to change out your front oxygen sensor.

Last edited by crabby1; 11-19-2010 at 08:13 PM.
Reply With Quote


2000, altima, knock, p0325, p0420

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 06:47 PM.

Privacy Statement - Advertise with Us - Terms of Use - Copyright 1999-2018 Nissanhelp.com
AutoCodes.com - Engine-Codes.com - HelpForCars.net - Infinitihelp.com - Nissanhelp.com
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO v2.0.0 Beta 2 (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.