Welcome to the North American Subaru Impreza Owners Club Saturday September 23, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Technical > Service & Maintenance

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Thread Tools Display Modes
Old 01-02-2009, 04:43 PM   #1
Scooby Newbie
Member#: 53755
Join Date: Jan 2004
Location: Washington
2000 Legacy GT LTD
Titanium Pearl

Default Bad Oxygen Sensor

Hi there,

My 2000 Legacy (2.5L) threw a CEL recently, and the code indicates a bad front oxygen sensor.

I'm wondering if there is any reason that I should replace the rear sensor at the same time? Also, to anyone who has experience changing one, am I going to need one of the sockets designed for removal/installation of oxygen sensors, or will a regular socket work?

* Registered users of the site do not see these ads.
jmika003 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 01-02-2009, 06:37 PM   #2
Scooby Specialist
Member#: 74321
Join Date: Nov 2004
Chapter/Region: MWSOC
Location: clarksville AR
2004 wrx wag
black UTEC stg 4


just replace the one that is bad. you will need to buy a socket or wrench for the o2.
crampfan is offline   Reply With Quote
Old 01-03-2009, 12:43 AM   #3
ForumWars Winner!
Member#: 196948
Join Date: Dec 2008
Chapter/Region: TXIC
Location: Kyle, TX
2003 Forester


Mine has that code (also a '00 Legacy), every time I reset the CEL with my scantool, it comes right back on when I turn the key on...usually the car will run for a while, recognize the error, and then have the CEL illuminate.

Now that you know what it is, can you clear it (at AutoZone for free, or other shop?) and let me know if it comes right back on? This would be a great experiment for me

PS-- best prices on OE-type front O2 sensors for our cars is at SparkPlugs.com , I have used them a lot the past 5 years and they are top notch and always cheapest. They are in CA.

PS-- front O2 should just be able to remove with a 7/8 open wrench, to fit a socket on there I think you'd have to pull the cat assemblies. No fun. Be sure to unplug the sensor first, or you'll twist up the cable when removing.
JamesWilson2 is offline   Reply With Quote

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
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Oxygen Sensor - What causes them to go bad? Carlito2002WGN Newbies & FAQs 9 04-28-2013 11:09 AM
2007 STI Front Oxygen Sensor ( O2 Sensor ) Nitro Don Engine/Power/Exhaust 0 02-13-2009 02:16 PM
oxygen sensor vs air/fuel sensor paintbing Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 21 10-02-2008 01:09 PM
Could a bad oxygen sensor slow my car down? Mohammadov Newbies & FAQs 7 06-21-2008 05:40 PM
FS: Front oxygen sensor 04 WRX 02 sensor Chino Bling Engine/Power/Exhaust 4 11-20-2007 11:56 PM

All times are GMT -4. The time now is 06:07 AM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.