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
2002 Quest o2 sensor Forums > > 2002 Quest o2 sensor 2002 Quest o2 sensor
Forgot Password? Join Us!


Quest Nissan Quest Discussion Forum

Reply
 
Thread Tools Display Modes
  #1  
Old 01-05-2007, 08:30 AM
rokrib
Guest
 
Posts: n/a
Default 2002 Quest o2 sensor

My service engine light came on. I had it scanned and the codes were as follows: (codes) po141 O2 sensor heater (Pending codes) PO325 Knock Sensor 1 and Po141 O2 sensor heater. I replaced the #2 sensor. My mechanic cleared the codes and the light went out. 2 days later the light came back on. I had it rescanned and it said the following (Codes) PO139 O2 Sensor CKT Slow Response and PO138 O2 sensor High Volts (Pending Codes)
PO325 Knock Sensor1, PO139 And PO138. It will not pass Pa Inspection in this condition. Any ideas?
Reply With Quote
  #2  
Old 01-05-2007, 11:36 AM
NissanTech's Avatar
NissanTech NissanTech is offline
Super Moderator
2004 Xterra
 
Join Date: Jun 2005
Location: California
Age: 49
Posts: 12,333
Default

Hello

The new codes you got, P0138 and P0139, are for the same sensor. It is possible that the new sensor you installed, for the P0141 code, was damage or incorrect. The P0325 Knock sensor code is very common and you need to replaced the Knock sensor to repair the problem.
__________________
Need A Repair Shop?
Find local automotive repair shops in your area.
AutoCodes.com Shops
Reply With Quote
  #3  
Old 01-05-2007, 03:25 PM
rokrib
Guest
 
Posts: n/a
Default

I know it was for the same sensor. How would I test it? Could something else cause those codes? Maybe a converter going bad?
Reply With Quote
  #4  
Old 01-05-2007, 07:42 PM
FieldRun
Guest
 
Posts: n/a
Default

Have you checked in the service manual on the testing procedure for the O2 sensor? I believe there are a few basic tests that can be done easily. With a code scanner vs scanner you can observe the voltage that the sensor is putting out. In general for O2's, I think the voltage should vary between 0.3 to 0.7 volts every half second or so, but you really should consult the Nissan service manual for your model vehicle. You can check other after market manuals on this but my experience shows that those books are not nearly as good. And a point to consider is that Nissan is providing it free to you so why not take advantage of their kindness? If you don't have a code scanner, I believe there are also other tests that can be done with a digital multimeter. I believe you can check the voltage at the connector and you can also check for continuity. But again, check in the Engine Control service manual for the correct testing procedure.
A few words of caution - - The ECM is sensitive to static electricity and damage from improper testing and connecting/disconnecting the sensors while the engine is running. Be sure to shut the engine off before disconnecting any sensors and ground out any static electricity from your body prior to touching the metal conductors going to the ECM. All of this is in the front of the manual. The ECMs are expensive and can be damaged if you are not careful when you are working in or near it. Read up, be careful and good luck.
Let us know your results.
Reply With Quote
  #5  
Old 01-13-2007, 12:39 PM
rokrib
Guest
 
Posts: n/a
Thumbs down Update

I ordered a new Sensor from Advance . ( in case that one was defective) It was a Bosch direct fit. Guess what. It did not fit. I checked the website and they show 2 different sensors for downstream. 1 is pretty straight forward with a 2 foot wire and a plug. The Bosch has a larger plug and a circular cap like it would connect through a floorboard. Are there more than 2 sensors? I know 1 is in plain sight under the hood. The one I replaced is on passenger side underneath ( it plugs in under a small skid plate). However that does not appear to be downstream of the converter. Which one is Bank 1 sensor 2? I could not find the service manual you referenced.
Reply With Quote
  #6  
Old 01-13-2007, 01:18 PM
NissanTech's Avatar
NissanTech NissanTech is offline
Super Moderator
2004 Xterra
 
Join Date: Jun 2005
Location: California
Age: 49
Posts: 12,333
Default

I'll try to upload the manual for your Quest this weekend.

There are only 2 sensors. Front and Rear.

See figures attached for location and inspection.
Attached Thumbnails
2002 Quest o2 sensor-figure-001-gif   2002 Quest o2 sensor-figure-002-gif   2002 Quest o2 sensor-figure-003-gif   2002 Quest o2 sensor-figure-004-gif  
Reply With Quote
  #7  
Old 02-03-2007, 10:38 AM
isac
Guest
 
Posts: n/a
Red face

You have to check the harness before 02 sensor connection plug it may be broken. I had this problem.

Last edited by isac; 02-03-2007 at 10:42 AM.
Reply With Quote
  #8  
Old 04-28-2008, 08:44 AM
murkho
Guest
 
Posts: n/a
Default

After getting P0141 and P0325 code, I replaced the rear 02 Sensor and the SES light came back on after 3 miles of driving. I have an Actron 9125 and it says it found 3 codes, P0141 Twice and P0325 once. The connectors look good and the O2 Sensor was by Denso and exact fit.
Anything else i may try? should i replace the front O2 sensor as well?
Reply With Quote
  #9  
Old 05-10-2008, 01:27 AM
t shoot man
Guest
 
Posts: n/a
Default po141 sensor heater fail

i have seen/repaired a broken wire/wires that will cause this at or before the "e40" connector right next to the alternator 4 pin connector wire color codes are wht blk yel and blu/yel.
the chassis harness plug/pigtail is a non dealer item now,go to a wrecking yard and find one if this is the problem.you might luck out at a parts store but i did not.
i found a few replacement "pins" in another plug and replaced them with some pin out tools and a piece of s/s bandit material.
if you don't have these tools but the problem is with the harness,you really don't need the connector just cut it off and get some butt connectors and connect them.
but test the 4pin coming from the wiring harness for proper voltage,etc.per the service manual first then connect.
oh yeah this is the rear o2 sensor for your info
Reply With Quote
  #10  
Old 09-20-2020, 07:36 AM
smile100h smile100h is offline
Registered User

1999 Quest GXE
 
Join Date: Feb 2008
Posts: 3
Default

I just fixed my 1999 Nissan Quest oxygen sensor error code with grounding bypass. Please refer to Nissan TSB-NTB99-004B and this YouTube video (Nissan truck o2 sensor code FIX! *CHEAP* - YouTube). This problem bothered me a couple of years and I replaced three front oxygen sensors and a bunch of parts with no use. Now, my Nissan works like a charm!

Oddly, 1999-2002 Nissan Quest has the same engine as its Pathfinder and Frontier, but Nissan didn't put this TSB to Quest.
Reply With Quote
Reply

Tags
2002, quest, sensor

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 06:46 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO v2.0.42 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.