Welcome to the North American Subaru Impreza Owners Club Friday October 24, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Normally Aspirated Powertrain

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.
Reply
 
Thread Tools Display Modes
Old 02-15-2009, 07:19 PM   #1
Reinonu
Scooby Newbie
 
Member#: 188534
Join Date: Sep 2008
Location: North Jersey
Vehicle:
2003 Impreza RS
Silver

Default Failing O2 sensor symptoms?

I've read around the forum and believe I've got a failing o2 sensor but i want to double check.
Car: 2003 Subaru Impreza RS with 65,000 miles. Did 60k mile tuneup.
Symptoms: Some time after Xmas the car started getting worse fuel efficiency (not horrible, but dropped about 20 miles a tank maybe more)
The idle is rougher at start up (I thought this was because it was winter, but now I'm not so sure) and it's very rich at start up (quite smelly). Then after driving around the idle and engine sound fine and the rich smell SEEMS to get better.
But NO Code, no hesitation under load, or really bad symptoms.

So it sounds like it's the rear o2 sensor going, not the front.

Is this pretty easy to replace? Do I need one of those o2 sensor wrenches?

Many thanks in advance.
* Registered users of the site do not see these ads.
Reinonu is offline   Reply With Quote
Old 02-15-2009, 09:15 PM   #2
toolbox1234
Scooby Newbie
 
Member#: 201466
Join Date: Jan 2009
Location: PA
Vehicle:
03 Baja
yellow

Default

I have an 03 baja 2.5 n/a that had a very wierd problem. When driving and you let off the gas to coast, upshift, downshift, or just to come to a stop, the engine would surge almost like tapping the brake pedal every 2 seconds. Then when at a stop, the idle would surge up and down and then finally settle. It was at the dealership for almost 2 weeks with them working on it every day, and after all was said and done it was the rear 02 sensor. It was the strangest thing either they or I had ever seen. They replaced the IAC, throttle body, tps, front 02, engine ECU, and then finally when they replaced the rear 02 it went away. There were no codes, and no indication that anything was malfunctioning when you looked at the data on the scan tool. Wierd ****. So even though yours obviously doesnt have the symptoms that mine had, it could very well be the rear 02 sensor, they can act very strange when going bad. If you replace it you should use an 02 sensor socket so you dont strip the nut on it and have to cut it out. It looked like it wasnt too hard to get at....Good luck, and post if it helped or not.
toolbox1234 is offline   Reply With Quote
Old 02-16-2009, 04:43 AM   #3
loccomoffo
Scooby Newbie
 
Member#: 200891
Join Date: Jan 2009
Chapter/Region: International
Location: Western Australia
Vehicle:
1995 Impreza EJ18
Shabby White

Default

Your rear o2 sensor is only for gauging the efficiency of the catalitic converter. so its not that.

The front o2 sensor is only used once the car goes int oclosed loop which is after the sensor and engine warms up.

Reinonu, your problem seems to happen in open loop when the sensor isn't in play. Once it is the car runs well.

Try checking the idle air control valve, which might not be opening the throttle (increasing idle speed) at cold starts thus not letting more air in and creating a rich mixture.
loccomoffo is offline   Reply With Quote
Old 02-16-2009, 08:11 AM   #4
Reinonu
Scooby Newbie
 
Member#: 188534
Join Date: Sep 2008
Location: North Jersey
Vehicle:
2003 Impreza RS
Silver

Default

Thanks, I'll take a look at the idle air control valve, and see how that looks.

Quote:
Originally Posted by loccomoffo View Post
Your rear o2 sensor is only for gauging the efficiency of the catalitic converter. so its not that.

The front o2 sensor is only used once the car goes int oclosed loop which is after the sensor and engine warms up.

Reinonu, your problem seems to happen in open loop when the sensor isn't in play. Once it is the car runs well.

Try checking the idle air control valve, which might not be opening the throttle (increasing idle speed) at cold starts thus not letting more air in and creating a rich mixture.
Reinonu is offline   Reply With Quote
Old 02-16-2009, 10:38 AM   #5
toolbox1234
Scooby Newbie
 
Member#: 201466
Join Date: Jan 2009
Location: PA
Vehicle:
03 Baja
yellow

Default

Sorry, I didnt notice that you said it got better once it was warm. Which in most cases would rule out the 02 sensors as loccomoffo said. Keeping that in mind, I would check the IAC like he said. Remove it carefully and look into the passages on the throttle body. It could be getting carboned up in there and might just need a good cleaning. Just be carefull when you remove it that you dont tear the gasket on the IAC. You might want to get a new gasket before you attempt to remove the IAC..
However, on my car the problem happened when it was hot or cold and still needed the rear 02 sensor, which didnt make any sense at all. But anyway, start with the IAC and see what happens.
toolbox1234 is offline   Reply With Quote
Old 02-16-2009, 11:57 AM   #6
Reinonu
Scooby Newbie
 
Member#: 188534
Join Date: Sep 2008
Location: North Jersey
Vehicle:
2003 Impreza RS
Silver

Default

ahhhh... thanks for the clarity. I've got access to any solvent (I'm a chemist) and it looks like the procedure is fairly straightforward. I'll buy the gasket just in case.
Thanks!

Quote:
Originally Posted by toolbox1234 View Post
Sorry, I didnt notice that you said it got better once it was warm. Which in most cases would rule out the 02 sensors as loccomoffo said. Keeping that in mind, I would check the IAC like he said. Remove it carefully and look into the passages on the throttle body. It could be getting carboned up in there and might just need a good cleaning. Just be carefull when you remove it that you dont tear the gasket on the IAC. You might want to get a new gasket before you attempt to remove the IAC..
However, on my car the problem happened when it was hot or cold and still needed the rear 02 sensor, which didnt make any sense at all. But anyway, start with the IAC and see what happens.
Reinonu is offline   Reply With Quote
Old 02-16-2009, 03:27 PM   #7
toolbox1234
Scooby Newbie
 
Member#: 201466
Join Date: Jan 2009
Location: PA
Vehicle:
03 Baja
yellow

Default

Let us know what happens.
toolbox1234 is offline   Reply With Quote
Old 02-16-2009, 07:43 PM   #8
nix-hex
*** Banned ***
 
Member#: 67809
Join Date: Aug 2004
Location: Franklin, WI
Vehicle:
1999 2.5 RS coupe
Black

Default

Quote:
Originally Posted by toolbox1234 View Post
I have an 03 baja 2.5 n/a that had a very wierd problem. When driving and you let off the gas to coast, upshift, downshift, or just to come to a stop, the engine would surge almost like tapping the brake pedal every 2 seconds. Then when at a stop, the idle would surge up and down and then finally settle. It was at the dealership for almost 2 weeks with them working on it every day, and after all was said and done it was the rear 02 sensor. It was the strangest thing either they or I had ever seen. They replaced the IAC, throttle body, tps, front 02, engine ECU, and then finally when they replaced the rear 02 it went away. There were no codes, and no indication that anything was malfunctioning when you looked at the data on the scan tool. Wierd ****. So even though yours obviously doesnt have the symptoms that mine had, it could very well be the rear 02 sensor, they can act very strange when going bad. If you replace it you should use an 02 sensor socket so you dont strip the nut on it and have to cut it out. It looked like it wasnt too hard to get at....Good luck, and post if it helped or not.
wow, whoever worked on your car sure is just a parts changer and not a real technician. if you are going to check an O2, you do it with a scan tool that gives you live O2 data stream. watch to see if they are switching properly. the front one should be switching from lean to rich fairly fast (100mv-800mv) once the car is good and warmed up with the O2 sensor monitor test run (if it hasnt been already) the rear O2 should be floating around the 450mv mark, which is telling you the cat is working properly and cleaning the exhaust. as for the surging part, it could be, but dont qoute me, the Knock sensor. i had similar symptoms where it would stall and buck on my on accel. but i got lucky and it gave me the one and only code that means replace knock sensor.
nix-hex is offline   Reply With Quote
Old 02-17-2009, 04:42 PM   #9
toolbox1234
Scooby Newbie
 
Member#: 201466
Join Date: Jan 2009
Location: PA
Vehicle:
03 Baja
yellow

Default

Yea, it was really wierd. I am a senior lexus tech/master ASE tech. I have never seen an issue like that before. Since I am experienced with diagnostics, I got myself involved in the diag process with the dealership and got to see the live data for everything including the 02 sensors. The front one was switching like it should have, and the rear was pretty constant like it should be. Like I said before they just got done replacing the clutch and then all the sudden I had this problem.
I was convinced they didnt connect something properly or pulled a wire and broke it inside the insulation. Unfortunately there were no codes and all the live data was within parameters, making it a bastard to figure out what was going on. From my experience I saw the steps they were taking to be the moves of a parts changer and not a diag specialist. Now, I am no diag "specialist" myself, but I have alot of experience with it. I would have done things differently, but they did eventually figure it out. So I walked away with a new clutch, Throttle body, IAC, TPS, Rear 02 sensor and a new ECU for free! Even though I had to wait almost 2 weeks, it was worth it.
What was happening, so they say, the rear 02 sensor was acting up in such a way that the scan tool couldnt pick it up, which is BS as far as i am concerned. I think when they removed the exhaust to replace the clutch the wires for the 02 sensor got pulled or they severed a ground connection somewhere and just didnt want to admit it (I wouldnt want to either). Me being a tech, I would be the last to point fingers or play the blame game with anyone, I have ****ed things up many times and didnt want to admit to it. So I just sat back and let them do their thing.
Now, I had just bought the car from that dealer 2 weeks prior to all this and was told by my salesman that if they were unable to figure it out, they would set me up with something newer substantially discounted. So either way I was in a great position.
Oh well, all I care about is that it is fixed and runs right now.

Last edited by toolbox1234; 02-17-2009 at 04:51 PM.
toolbox1234 is offline   Reply With Quote
Old 02-17-2009, 06:59 PM   #10
nix-hex
*** Banned ***
 
Member#: 67809
Join Date: Aug 2004
Location: Franklin, WI
Vehicle:
1999 2.5 RS coupe
Black

Default

thats good to hear then. yeah they probably pulled a wire. sometimes you can have a wire half-break inside where you cant see it. it may work on time but over a bumb it might not. thats nice you got all that for free!
nix-hex is offline   Reply With Quote
Old 02-22-2009, 04:27 PM   #11
Reinonu
Scooby Newbie
 
Member#: 188534
Join Date: Sep 2008
Location: North Jersey
Vehicle:
2003 Impreza RS
Silver

Default Update

Okay, back to the thread topic... here's an update.

Car:
2003 Impreza RS (no turbo), 65.5k miles, automatic

Symptoms:
mpg dropped from 23.6 to 20.9 (this car does about 80% city driving)
more of a rough idle at start-up with more noise than usual
more of a rough idle in general (you notice more vibrations in the steering wheel at a red light)
But no code, no stalling, and no severe ride issues.

Solution:
Thanks to you guys I got pointed in the direction of the idle air control valve and away from 02 sensor. That was a huge help. I then found this thread: http://forums.nasioc.com/forums/showthread.php?t=781242 which had great info. However it seemed to mainly apply to the WRX versions with the removing the IACV, cleaning, and replacing the gasket, etc.; the RS doesn't have this. But posts 17 and 30 in that thread pointed me to this VERY important link:
http://endwrench.com/images/pdfs/ISCSpring04.pdf
This is very interesting post because it's obviously a GM part# being used on a Subaru car. So I went to the Subaru parts dealership and talked with those guys. They didn't know anything about this particular product but mentioned that I ought to just use some "throttle body cleaner". This was my fall back in case I couldn't find the Upper Engine Cleaner. I then went to two GM dealerships to find it. They think it's not being made anymore (i hope that's for environmental reasons and not because they found out it actually destroys your car!). The directions on the link and on the can are basically the same. The ones on the can make it sound like you spray the entire can into your throttle body. It opted for the two 10 second sprays during 1500 rpm idle each followed by 3-5 minutes of sitting before restarting the car. Then I kept the car at 1500 rpm for about 5-10 minutes. I'd definitely suggest gloves and eye protection because you could easily spray yourself in the face with the splatter from the spray hitting the throttle plate. And then clean up anything touching plastic.

Result:
So far so good. The idle is definitely better and I think some of the pinging I use to hear on acceleration has decreased. The idle at red lights is smooth again. I'll have to wait until morning to see how the cold start idle is. I topped off the gas tank and I'll be able to see how the fuel efficiency changed in a couple of weeks (two tanks should be sufficient for determining a notable improvement).

Thanks again for getting me headed in the right direction. Who needs a mechanic when you've got a forum! God I love the internet!
Reinonu is offline   Reply With Quote
Old 02-22-2009, 08:17 PM   #12
loccomoffo
Scooby Newbie
 
Member#: 200891
Join Date: Jan 2009
Chapter/Region: International
Location: Western Australia
Vehicle:
1995 Impreza EJ18
Shabby White

Default

Good to hear that you've solved the problem It's good fun diagnosing even from the other side of the world

gotta love the internets

Thanks for the detailed update
loccomoffo is offline   Reply With Quote
Old 03-24-2009, 08:32 PM   #13
Reinonu
Scooby Newbie
 
Member#: 188534
Join Date: Sep 2008
Location: North Jersey
Vehicle:
2003 Impreza RS
Silver

Default No lluck on the improvement

Well, the upper engine cleaner helped a little bit, but it definitely didn't fix the problem.
The fuel efficiency didn't change at all. And the idle can certainly be improved.
Other notes:
The battery died the other day, but isn't quite dead so I'm still driving on it. I will probably have to replace it this weekend.
I also need to tighten the A/C compressor belt. It's squeeking a bit, but I don't have a way to measure the tension.

other than that I don't have anymore information to offer.

I'm tempted to take it to the dealer, but without a code or more specific issues I am very hesitant.

Any more thoughts?
Reinonu is offline   Reply With Quote
Old 03-25-2009, 08:23 AM   #14
loccomoffo
Scooby Newbie
 
Member#: 200891
Join Date: Jan 2009
Chapter/Region: International
Location: Western Australia
Vehicle:
1995 Impreza EJ18
Shabby White

Default

Next step is to clean teh MAF if you can, this governs the fuel delivery in open loop. Mine is a hot wire type so it was easy to clean using carby cleaner. I think your's is an enclosed type??? Anyone clean these successfully??

Also it might be an Engine cooland temp sensor. Test this to make sure it's within spec. Test it on teh engoine as I had one test good out of teh car and only when I tested it in teh engine did I discover it to be the problem.

As for belt, tighten until you can push/pull the belt 10mm either way from staight. Even when applying quiet a bit of force with your fingers. If it keeps on squeeking, replace teh belt as it might have polished it self and is losing grip.

Good luck
loccomoffo is offline   Reply With Quote
Old 03-25-2009, 10:16 AM   #15
deamon64
Scooby Newbie
 
Member#: 125058
Join Date: Sep 2006
Chapter/Region: E. Canada
Location: Ottawa
Default

Have you tried changing the PCV valve? I had similar problems with rough idle and low mileage and they got much better after changing it. Take it off and shake it. If you can't hear anything clean it/change it.
deamon64 is offline   Reply With Quote
Old 03-25-2009, 10:36 AM   #16
RedRex26
Scooby Specialist
 
Member#: 133418
Join Date: Nov 2006
Chapter/Region: Tri-State
Location: middle of no where
Vehicle:
2006 DOM3 XTR WRX TR
SRR 407whp 365wtq ppg'd

Default

honestly i would change the front 02 sensor. i had the same problem when i owned my 02 rs and i went through the same checklist your doing i cleaned the iac and checked everything under the sun. my car acted the same way and eventually got so bad i wouldn't idle for more then 3 mins. I eventually took a spare oxygen sensor that we had lying around from another impreza and installed it and everything went away.
RedRex26 is offline   Reply With Quote
Old 03-25-2009, 05:36 PM   #17
formula91
Scooby Specialist
 
Member#: 102984
Join Date: Dec 2005
Chapter/Region: MWSOC
Location: Northbrook, IL
Vehicle:
2005 2.5RS 4EAT
Platinum Silver

Default

If there is no CEL, it's hard to tell, that's for sure.

Front O2 might be a problem if it's continually running rich. There is absolutely no way to tell without a live data logger, or a high impedance voltmeter.

Do you have a sooty exhaust? If so Front o2 may be your problem.

If the MAF cleaning (Subarus are easy to clean, just unplug the sensor, unscrew it, then take some q-tips with some rubbing alcohol and carefully remove the gunk) and fuel injector cleaning doesn't work, then it's your oxygen sensor most likely.

A bad o2 sensor does not have to throw a code necessarily.

PS:

The ECU does give the rear oxygen sensor authority to change fuel trims by 20% IIRC (or was it 10%?). It's main job is to watch the cat converter, but it CAN change fuel trims based on comparisons with the front o2. Or something like that. I'm no expert.
formula91 is offline   Reply With Quote
Old 03-26-2009, 03:19 AM   #18
loccomoffo
Scooby Newbie
 
Member#: 200891
Join Date: Jan 2009
Chapter/Region: International
Location: Western Australia
Vehicle:
1995 Impreza EJ18
Shabby White

Default

Connect the o2 sensor up to a multimeter or oscilloscope. then unplug any vacuum line, thus instroducing unmetered air into the engine (lean condition). and watch for sensor output change.

Also the o2 sensor should cross the 0.45v point about twice per second if working well.

If the car is idling rough then it;s not teh o2 sensor as it's input is not taken into consideration in open loop.

Also don't touch the MAF sensor with anything just spray it with cary cleaner, the wire type are very fragile.
loccomoffo is offline   Reply With Quote
Old 03-27-2009, 01:45 AM   #19
formula91
Scooby Specialist
 
Member#: 102984
Join Date: Dec 2005
Chapter/Region: MWSOC
Location: Northbrook, IL
Vehicle:
2005 2.5RS 4EAT
Platinum Silver

Default

Quote:
Originally Posted by loccomoffo View Post
Connect the o2 sensor up to a multimeter or oscilloscope. then unplug any vacuum line, thus instroducing unmetered air into the engine (lean condition). and watch for sensor output change.

Also the o2 sensor should cross the 0.45v point about twice per second if working well.

If the car is idling rough then it;s not teh o2 sensor as it's input is not taken into consideration in open loop.

Also don't touch the MAF sensor with anything just spray it with cary cleaner, the wire type are very fragile.
You need a high impedance voltmeter to get a decent reading. A cheapo one from the hardware store will probably not work.

You can use q-tips and alcohol. Read the Unabomber maintenance FAQ. I'm willing to bet hundreds have done it like that. No big deal. But carb cleaner works. There's also MAF cleaner sprays.

If all else fails try Seafoam and see what happens.
formula91 is offline   Reply With Quote
Old 03-28-2009, 04:20 PM   #20
Reinonu
Scooby Newbie
 
Member#: 188534
Join Date: Sep 2008
Location: North Jersey
Vehicle:
2003 Impreza RS
Silver

Default

Quote:
Originally Posted by deamon64 View Post
Have you tried changing the PCV valve? I had similar problems with rough idle and low mileage and they got much better after changing it. Take it off and shake it. If you can't hear anything clean it/change it.
Thanks for all the advice! I'm sure this can get sorted out fairly quick. My time is fairly limited and I'm too cheap to go to a mechanic

I will start with the PCV valve, which I just bought. I'll see if it makes noise, etc.
Then I'll move to the MAF.
The o2 sensor isn't exactly cheap to replace so I'm not planning on doing that unless forced.

I'll post back with an update.

Thanks again!
Reinonu is offline   Reply With Quote
Old 03-28-2009, 05:24 PM   #21
Reinonu
Scooby Newbie
 
Member#: 188534
Join Date: Sep 2008
Location: North Jersey
Vehicle:
2003 Impreza RS
Silver

Default

Scratch that... Subaru sold me the wrong PCV part it seems, because the nipple part is much smaller than what's on my car, plus I don't have the right socket to remove the PCV valve (what is that deep socket 19mm?) on a 2003 Impreza RS


Quote:
Originally Posted by Reinonu View Post
Thanks for all the advice! I'm sure this can get sorted out fairly quick. My time is fairly limited and I'm too cheap to go to a mechanic

I will start with the PCV valve, which I just bought. I'll see if it makes noise, etc.
Then I'll move to the MAF.
The o2 sensor isn't exactly cheap to replace so I'm not planning on doing that unless forced.

I'll post back with an update.

Thanks again!
Reinonu is offline   Reply With Quote
Old 04-13-2009, 07:31 PM   #22
Bluefoton
Scooby Specialist
 
Member#: 141373
Join Date: Feb 2007
Chapter/Region: E. Canada
Location: Quebec, QC
Vehicle:
2008 2.5i-hatch -
now with a HID retrofit

Default

^ any updates? My highway MPG has significantly dropped this year from 28 mpg to 23 - and that's over a series of same few hrs drives on the freeway under the same speed. Worst part is that I recently changed the plugs, fuel filter, and air filter. Can't think of anything else but the o2
Bluefoton is offline   Reply With Quote
Old 04-14-2009, 09:05 PM   #23
hwiley74
Scooby Newbie
 
Member#: 207230
Join Date: Mar 2009
Chapter/Region: NWIC
Vehicle:
2002 Ipreza RS 2.5
White

Default 02 sensor issue

02 Impreza RS 2.5 (non-turbo) SOHC

Most of this thread I've experienced. Had trouble with rough idle, engine surge at idle, and decreased gas mileage. Replaced plugs, wires, PCV, and fuel filter. Still ran rough. Replaced front 02 sensor with Bosch replacement part. That fixed the idle problem but now the engine "coughs" at random times. Happens at low speeds, cruising speeds, various RPM's, and when accelerating or decelerating. Can't id a pattern. Probably does this hesitation about once every 5 minutes. Thought about trying a different 02 but this one isn't throwing any codes. Any ideas?
hwiley74 is offline   Reply With Quote
Old 04-14-2009, 09:08 PM   #24
RaceFaceXC
NASIOC Supporter
 
Member#: 165749
Join Date: Dec 2007
Chapter/Region: South East
Location: stupid Florida
Vehicle:
2007 No YELLING
on the bus!

Default

Quote:
Originally Posted by hwiley74 View Post
02 Impreza RS 2.5 (non-turbo) SOHC

Most of this thread I've experienced. Had trouble with rough idle, engine surge at idle, and decreased gas mileage. Replaced plugs, wires, PCV, and fuel filter. Still ran rough. Replaced front 02 sensor with Bosch replacement part. That fixed the idle problem but now the engine "coughs" at random times. Happens at low speeds, cruising speeds, various RPM's, and when accelerating or decelerating. Can't id a pattern. Probably does this hesitation about once every 5 minutes. Thought about trying a different 02 but this one isn't throwing any codes. Any ideas?
How long has the new O2 sensor been installed?
RaceFaceXC is online now   Reply With Quote
Old 04-14-2009, 09:16 PM   #25
formula91
Scooby Specialist
 
Member#: 102984
Join Date: Dec 2005
Chapter/Region: MWSOC
Location: Northbrook, IL
Vehicle:
2005 2.5RS 4EAT
Platinum Silver

Default

Well you are using a universal front o2. At random times they seem to cause problems here and there. I would recommend getting the OEM part.
formula91 is offline   Reply With Quote
Reply

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
Help. o2 sensor subizzo02 Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 6 06-04-2010 07:03 PM
Front o2 sensor tool in MA? Emissions FAIL! segerton New England Impreza Club Forum -- NESIC 10 03-15-2010 05:59 PM
how often do front o2 sensors fail? adWRXi Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 9 06-04-2009 03:06 AM
Symptoms of Failing Speed Sensor ?!?! Drakuun Transmission (AT/MT) & Driveline 0 08-06-2007 11:11 AM
What would cause O2 sensor to keep failing? Sobelizard109 Legacy Forum 10 03-13-2003 04:13 PM


All times are GMT -4. The time now is 05:32 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.