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Cannot Remove 02 Sensor

Posted by Boddie, Jul 16, 2013

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  1. Boddie

    Boddie Proven Member

    Joined Aug 21, 2012
    Ames, Iowa

    Been throwing CELs recently for my O2 sensor, and I noticed the voltage was stuck at 0.03 V after warmed up. There is no fluctuation whatsoever. I have a new Denso sensor, and I would like to put it in. The problem is that the one in there will not come out. I have tried soaking it overnight in PB Blaster, using the special O2 removing socket with ratchet+extension+breaker bar, and I have also tried taking the car for a hard drive to get it all nice and hot at the same time. It has not budged at all. Luckily I have not rounded the the O2 sensor at all, so I keep feeling there is some kind of hope to get it out.

    Would it be better just to replace the whole damn O2 housing and cut the wire off while not bothering to get the sensor out? I have an after market O2 housing lying around, but was waiting to put it on once I ordered the rest of the exhaust parts with it. I have near completely given up on removing this sensor, and I have to drive this car several hours a day with a bad O2 until I can get it replaced for it is my only car, and I have to get to work.
  2. grothe3297venge

    grothe3297venge Proven Member

    Joined Jan 18, 2011
    Iowa City, Iowa
  3. Boddie

    Boddie Proven Member

    Joined Aug 21, 2012
    Ames, Iowa
    I am thinking about calling some local shops and seeing if one will just loosen it for me, but I hope they would not charge much. Honestly, for the price I paid for the sensor and the tools already (not counting putting in several hours in removal attempts) I feel it would have been more cost and time effective to just have a shop do it.
  4. grothe3297venge

    grothe3297venge Proven Member

    Joined Jan 18, 2011
    Iowa City, Iowa
    I guess that would work to, wouldn't think a shop would charge that much. Guess it depends what they do to also get it out if its as stuck as you say it is.
  5. Nasty Dream

    Nasty Dream Proven Member

    Joined Aug 30, 2011
    Alexandria, Virginia
    Hey. I ordered a "Titan" brand 32" breaker bar. The bar was $20 or $30, and it's a really good tool to have.
    rented the o2 socket set from Advance Auto Parts for $30, which they reimburse when I return the kit.

    And attached them with a Craftsman socket adapter 1/2" to 5/8" or whatever
    (FYI: I didn't trust the Stanley - it seemed like it would slide off and my radiator or me would be injured)

    The bar was flexing quite a bit, but it was pretty easy with that much leverage.

    625  0

    1995 Mitsubishi Eclipse GST
    manual · 2G DSM
  6. Boddie

    Boddie Proven Member

    Joined Aug 21, 2012
    Ames, Iowa
    I called the local shops and they all wanted to charge about an hour of labor for loosening it for me, which that turns out to be $80 at the cheapest... Did not realize how expensive and time consuming of a job an O2 sensor is...
  7. lasthope05

    lasthope05 Proven Member

    Joined Mar 31, 2006
    Philadelphia, Pennsylvania
    Take it off hot after letting the car run for a bit or use a propane torch will make things much easier.
  8. Boddie

    Boddie Proven Member

    Joined Aug 21, 2012
    Ames, Iowa
    I tried it after the car is fully warmed up and did not help as said in my first post. I feel the cost of a propane torch setup will be more than the cost of having someone else do it.

    UPDATE: After looking I guess there are some cheap ones

    MITSUMURDOK Proven Member

    Joined Jul 12, 2005
    Newburgh, New York
    Try using a piece of longer pipe over the breaker bar to give you more leverage. I have done this many times with stubborn bolts and it usually works, unless they are completely rust welded. Good luck.

    Street Build 556  3

    1999 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    497  6

    1995 Eagle Talon TSi AWD
    manual · 2G DSM
  10. ICM_MikeLago

    ICM_MikeLago Supporting VIP

    Joined Nov 1, 2012
    Silver Springs, Nevada
    Have you tried soaking it with anti-seize? Since the sensor is no good anymore I would cut the wire, grab a deep socket, and use an impact. If you dont have a good impact gun you can use a breaker bar like the other posters are recommending.

    Road Race Build 2K  0

    1997 Mitsubishi Eclipse GSX
    manual · 2G DSM
  11. edged1g

    edged1g Proven Member

    Joined Feb 23, 2005
    Huntingdon Valley, Pennsylvania
    This is the only way i have found to guarantee removing them. Do you have a friend with an air gun?

    Street Build 1K  0

    1992 Eagle Talon TSi AWD
    manual · 1G DSM
  12. 99gst_racer

    99gst_racer Moderator

    Joined Apr 5, 2003
    Coloma, Michigan
    If I already had a new sensor and housing, I'd just swap those in together rather than struggle with a stuck sensor.

    Street Build 7K  67

    1999 Mitsubishi Eclipse GST
    609.8 whp · 541.2 lb/ft · 2G DSM
  13. PieEyedPiper

    PieEyedPiper DSM Wiseman

    Joined Nov 13, 2004
    North Bay Area, California
    Agreed. ^^^
    Having had the 02 sensor stump me more than once I've done a few things to get it out. One was to go to my local (friendly) shop. I just rolled in and my guy hopped right over and broke it loose for me. No charge, was only 3 minutes of work. I did buy him beer though.
    Another couples times later it was so stuck that I resorted to removing the 02 housing itself. Popped that bad boy into the bench vice and was able to unscrew the housing from the sensor with my hands.

    Use this: 4099d1280704274-how-i-changed-oxygen-sensor-f-ratio-my-2003-crv-image_3776.jpg

    And not this: 21RviNs-b0L.jpg

    The right tool makes all the difference, I have no issue now that I use the correct socket. Good luck.

    2K  0

    1998 Mitsubishi Eclipse GSX
    manual · 2G DSM
  14. Chad1993

    Chad1993 Proven Member

    Joined Sep 1, 2012
    Batesville, Arkansas
    I broke my front O2 inside the housing.. So I had to take the turbo off and drill it out and tap new threads. Worst 8 hours working on a car.

    502  0

    1995 Mitsubishi Eclipse GSX
    · 2G DSM
  15. Bud92gsx

    Bud92gsx Proven Member

    Joined Jan 16, 2008
    Wisconsin, Wisconsin
    Take the o2 housing off,buy one from the classifieds and get a new sensor swap that all on.

    Thats what I would do, work smarter not harder right?

    5K  20  14

    1992 Mitsubishi Eclipse GSX
    13.300 @ 102.400 · 1G DSM
  16. johnmel

    johnmel Proven Member

    Joined Mar 10, 2012
    Levittown, Pennsylvania
    If you have a o2 housing what are you doing all this for, just get it over with already

    637  0

    1996 Mitsubishi Eclipse GST
    · 2G DSM
  17. delta448

    delta448 DSM Wiseman

    Joined Jan 13, 2006
    Clarksburg, West Virginia
    Take it for a drive, get it hot, then immediately after you shut it off, turn a can of air duster upside down to release the nitrogen propellant and shoot it into the little opening the wires exit from. That should thermal shock it enough for it to break free. Also, when you install the next one, liberally use a quality high temp anti-seize on the threads like you should on all your exhaust fasteners.

    2K  5

    1998 Eagle Talon TSi AWD
    awd · manual · 2G DSM

    2K  11

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM
  18. squid267

    squid267 Proven Member

    Joined Jan 14, 2012
    Worcester, Massachusetts
    Had same issue. Bring it to a shop. Done in 5 mins. charged me an half hour of labor but it was worth it.
  19. IrishBeatdown

    IrishBeatdown Proven Member

    Joined Feb 3, 2012
    Tucson, Arizona
    I chopped the o2 after rounding off the bolt with a o2 socket and a breaker bar. The o2 socket was so cheap it actually bowed outward. So much for autozone sockets. It lives on my back porch now, the thing is so evil i gave it a chance to trip people up on the way to the pool.


    631  0

    1997 Mitsubishi Eclipse GSX
    · 2G DSM
  20. vince6756

    vince6756 Proven Member

    Joined Oct 30, 2010
    Back Street USA, Minnesota
    Get yourself some PB Blaster and go to town.

    Street Build 1K  10

    1997 Mitsubishi Eclipse Spyder GST
    12.627 @ 110.430 · 2G DSM
  21. Boddie

    Boddie Proven Member

    Joined Aug 21, 2012
    Ames, Iowa
    Well right after I got to work this morning I let the car cool down and soaked in some PB Blaster again in the garage here. Then tried to hit it with an impact wrench at 100 PSI and did not budge. Took it for a ten minute drive while it is like 90 degrees outside 10 minutes ago, came back and tried it again. Still did not budge a bit. Squid267 I asked the local shops and all would charge me an hour of labor minimum. Cheapest was $80, and there is no guarantee they would get it off in an hour.

    I may just try to get the O2 housing off, but not looking forward to the upcoming problems there... I may just have to drive it with no O2 sensor for a few weeks...
  22. Boddie

    Boddie Proven Member

    Joined Aug 21, 2012
    Ames, Iowa
    Well this coming Monday I was planning on getting the new O2 sensor and a lot of the new exhaust parts put in, but until then I still needed the car to get back and forth from work. It was driving alright just burning up a lot of fuel so far since last week until this morning. I went to start the car, and it will start -> rev to about 1200 RPMs -> drop to about 400 RPMS -> Oscillate 2 or 3 times then die... It started throwing new CELs this morning when it did this. Suddenly it threw not only code 11 for the O2 sensor, but also threw 12 and 25 for the maf and baro sensor.

    I noticed the some of the wire insulation on the O2 sensor is a little tore up from trying to remove it. If some of these wires crossed would that of caused other sensors to get killed in the process? It is a shame that the O2 sensor would not come out by any reasonable means, but I still need to get to work somehow, so any advice would be grand. Thank you!

    Well I just found this, and it says it could cause a trace to blow. When I go home I will disconnect the sensor completely and then take out the ECU and see if any damage was done in case there was a short. Is there any fuse related to the O2 sensor that could have blown?

    So I went out there to check the ECU, but went to disconnect the battery first. When I grabbed the terminal it just popped out!


    I went and put a new terminal in, and car ran again. O2 sensor is still bad though, so I disconnected it entirely... actually ran better that way. Will have a new one in Monday for sure.
  23. Boddie

    Boddie Proven Member

    Joined Aug 21, 2012
    Ames, Iowa
    BTW I never got it out of the O2 housing... When the exhaust was replaced just put the O2 in the new housing. No longer runs rich.
  24. LarryJoe

    LarryJoe Proven Member

    Joined Feb 10, 2012
    Davisville, West Virginia
    I had this same issue. An o2 socket, snap-on 1/2" drive extension, and a snap-on breaker bar solved it for me.
  25. CanadianTalonTC

    CanadianTalonTC Proven Member

    Joined Jul 8, 2011
    Lethbridge, AB, Canada
    FWIW when I did my 02 sensor that was EXTREMELY stuck and stripped. I hammered a 12pt 21 mm socket onto it after breaking off the end and then used a large breaker bar. Came right out.


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