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Replacing O2 sensor

Discussion in '1st Gen. Tacomas' started by pittim, Nov 24, 2008.

  1. Nov 26, 2008 at 1:50 PM
    #21
    pittim

    pittim [OP] Play stupid games, win stupid prizes

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    Wow, unclipping this thing is turning out to be a pain.
     
  2. Nov 26, 2008 at 3:43 PM
    #22
    pittim

    pittim [OP] Play stupid games, win stupid prizes

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    I hate rust. The nut was pretty much falling apart in the socket, so on friday it goes in to the shop. At least I started it for them...
     
  3. Nov 26, 2008 at 3:44 PM
    #23
    HerNameIsLucy

    HerNameIsLucy I miss Lucy. :-(

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    She's gone but not forgotten.
    that sux. did you soak it overnight with PB first?
     
  4. Nov 26, 2008 at 3:46 PM
    #24
    pittim

    pittim [OP] Play stupid games, win stupid prizes

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    not overnight, but I let it sit for about 15 min.

    On the can it just says let sit for a couple minutes before doing anything, and longer for more difficult applications. figured 15 min would be enough.
     
  5. Nov 26, 2008 at 4:16 PM
    #25
    pittim

    pittim [OP] Play stupid games, win stupid prizes

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    Might run to sears tonight and pick up a set of bolt extractors and work on it some more tonight.
     
  6. Nov 26, 2008 at 4:17 PM
    #26
    HerNameIsLucy

    HerNameIsLucy I miss Lucy. :-(

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    The head sheared off? Maybe get the other bolt out, lift out the sensor and see if you can vice-grip what's left of the broken one out.

    Don't wanna get you in over your head, but how good are you with a bernz-o-matic torch?
     
  7. Nov 26, 2008 at 4:36 PM
    #27
    pittim

    pittim [OP] Play stupid games, win stupid prizes

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    a what?


    The nuts are rounded off. If I get these you think I could get the nuts off with them? I'd have to get new nuts, but that isn't a problem.
     
  8. Nov 26, 2008 at 4:38 PM
    #28
    HerNameIsLucy

    HerNameIsLucy I miss Lucy. :-(

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    Worth a shot. But I think I'd just run by a muffler shop and ask them if they can finish getting them off for you. I'd bet most little mom-pop shops would do it for very little or free.
     
  9. May 12, 2013 at 1:55 PM
    #29
    Cirrusmonkey

    Cirrusmonkey New Member

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    I was having troubles with un clipping it too. Until I reaized that I was pinching it from the wrong side.
     
  10. May 12, 2013 at 2:51 PM
    #30
    Razgriz

    Razgriz wtf am i reading

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    5 year old thread bump ftw.
     
  11. Aug 1, 2014 at 11:54 AM
    #31
    BRP27

    BRP27 When I grow up I want to be just like Me

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    So far south in Texas my feet are in salt water
    Vehicle:
    04 4X4 Tacoma SR5
    3 in Ultimate ToyTec, set @ 2.5 in. AAL PINCH Weld Mod ( beat the pinch weld over inside the fender) Painted the pinch weld on bottom of cab Black Hi Lift Knock off
    6 yr old thread , But usefull P0031 code so I found the first O2 upsteam of cats. This is what this code means on a 04 Tacoma 4X4 V6 SR5. Looked at the mounting up stream of the Cat and used a box end 13mm to work the nuts off, Move it a little to left then right, back and forth, Move it a little out, move the nuts in. These exhast connections need to be worked back and forth to unload the threads from the rust that has built up . Both nuts come off with no pent oil! (I was out off pent oil.) Trace the wire up to the manual transmisison top , pull the covers off the manual trans sticks and locate the connector. Read that the connector needs to turn back towards the transmission sticks to get to the connector latch. So I remove the O2 sensor so I can get some slack in the cable. Break(on purpose) the mount from the connector to the transmission with a screw driver( I just pried the mount until it came lose which broke it) Un latch the connector by inserting a slim screw diver in the latch and pulling on the connector( gently) at the same time. Lower the O2 sensor to the ground and remove. Call up the local parts house (O`Reilley) and they can have a Denso here tommorow for $138. Denso is OEM, I can see Denso marked on the old one. The hardest part is getting at the connector to unplug it and that wasn,t very hard.
     
    Last edited: Aug 1, 2014
  12. Aug 28, 2014 at 3:22 PM
    #32
    Devout

    Devout Well-Known Member

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    None yet
    Anybody have a Denso part number? All I can find is the downstream one.

    2003 3.4l MANUAL

    Found: DENSO Part # 2349003 {#8946735021} OE Style
    [​IMG] [​IMG] Upstream; Standard trans.


    Current discount code is 2456485322894504 :cool: (good through 10/18/2014)

    So, $111 shipped. Gotta love Rock Auto. USPS or FexEx shipping means you never have to deal with the stinkin' brownshits, ah, I mean brownshirts. :rolleyes:
     
    Last edited: Aug 28, 2014
  13. Aug 28, 2014 at 5:15 PM
    #33
    BRP27

    BRP27 When I grow up I want to be just like Me

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    So far south in Texas my feet are in salt water
    Vehicle:
    04 4X4 Tacoma SR5
    3 in Ultimate ToyTec, set @ 2.5 in. AAL PINCH Weld Mod ( beat the pinch weld over inside the fender) Painted the pinch weld on bottom of cab Black Hi Lift Knock off
    Denso PN for 2003 and 04 3.4L , Upstream O2 sensor, 234-9001
     
  14. Oct 28, 2014 at 5:24 PM
    #34
    Enoxon 9598

    Enoxon 9598 Member

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    Has anyone ever seen the o2 sensor cause problems ( bad fuel economy, crappy acceleration etc) without throwing a code?
     
  15. Oct 28, 2014 at 8:26 PM
    #35
    wcp0611

    wcp0611 Well-Known Member

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    Grey wire and keyless entry. I like stock.
  16. Oct 30, 2014 at 4:07 AM
    #36
    bmka87

    bmka87 Well-Known Member

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    Yup, dropped about 3-4 mpg's for a few months now. Just threw the P0125 code last week, part came in yesterday. Since it's the A/F you are potentially running rich and unable to enter the closed loop function which uses more fuel then necessary.
     
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