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Oxygen sensor confusion

Discussion in '1st Gen. Tacomas (1995-2004)' started by rflay, Mar 7, 2020.

  1. Mar 7, 2020 at 8:06 PM
    #1
    rflay

    rflay [OP] Member

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    Hi, I just recently ordered a replacement downstream o2 sensor for my 2001 tacoma (Denso 234-4189). I removed the current installed o2 sensor and it has a Toyota number of 89465-04210. I researched and can only pull it up as being offered used by TLS Recycling and shows to be for 2016 year model. Can anyone weigh in on this? Thanks in advance.......would this have caused a code issue?

    1233BE21-51E9-4646-9569-CD673EC3ABE4.jpg
     
  2. Mar 7, 2020 at 8:17 PM
    #2
    Black DOG Lila

    Black DOG Lila Well-Known Member

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    Stock. EZ pass.Dump pass.Inspection sticker.Convict printed lic.plates.FG cap.
    Currygoat and CS_AR like this.
  3. Mar 7, 2020 at 8:32 PM
    #3
    rflay

    rflay [OP] Member

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    I understand sticking with denso, I was wondering why it would of had the Toyota sensor in it that has the listed part number.....it has been serviced by Toyota dealership for the past 15 1/2 years.
     
  4. Mar 8, 2020 at 4:59 AM
    #4
    sgtnewundies

    sgtnewundies Well-Known Member

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    Working on it now....UNDER CONSTRUCTION
    You have two sensors. Go to Denso Site and put in the year vehicle. I would replace both.
     
  5. Mar 8, 2020 at 5:21 AM
    #5
    Wyoming09

    Wyoming09 Well-Known Member

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  6. Mar 8, 2020 at 6:59 AM
    #6
    Old n' slow

    Old n' slow Well-Known Member

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    When I took out my original equipment O2 sensors I couldn’t make sense of the code on it either......Like others have said , and you did, just go with the Denso replacement.
    It looks like the sensor has been in since new, why would it only now throw a code after all these years ? Because it’s worn out .....plain and simple.
     
  7. Mar 8, 2020 at 7:24 AM
    #7
    Black DOG Lila

    Black DOG Lila Well-Known Member

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    Stock. EZ pass.Dump pass.Inspection sticker.Convict printed lic.plates.FG cap.
    Underpaid Toyota tech swapped a used sensor for new to put in his/her
    2000 Taco?
    Stealership didn't have the right part and could care less?
    Misteaks are made, especially on Monday and Friday.
    New members post bs to get to 50?
     
  8. Mar 8, 2020 at 7:59 AM
    #8
    rflay

    rflay [OP] Member

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    I am not trying to post bs Black Dog Lila, I just purchased the truck and have all service records since 2005. The issue came up in like 2010, dealership quoted new cats as the issue. It had a code of p0402 , he never replaced the cats but the dealership charged him $283.00 for a new upstream a/f sensor plus labor. The dealership just installed upstream sensor on Feb 20, 2020. I purchased and light came on next day.......I ordered and replaced the downstream myself ........fingers crossed, so far .....so good. I just found it odd that the downstream Factory sensor came back to a 2016.......the nuts are sensor were so bad that it took a 11mm, and 10mm socket to remove a 12mm locking nut. Thanks for the feedback all, just a curious new taco owner.
     
  9. Mar 8, 2020 at 8:06 AM
    #9
    rflay

    rflay [OP] Member

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    I know I will get slammed for this question, but oh well. When I pulled the old o2 sensor out it was wet, does this mean anything to anyone?
     
    Black DOG Lila likes this.
  10. Mar 8, 2020 at 8:09 AM
    #10
    Black DOG Lila

    Black DOG Lila Well-Known Member

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    Normal condensation in exhaust probably after sitting overnight.
     
    rflay [OP] likes this.
  11. Mar 8, 2020 at 3:54 PM
    #11
    Wyoming09

    Wyoming09 Well-Known Member

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    Wet with water ??

    Soaked in oil wet ?

    Wet can mean quite a lot
     
  12. Mar 8, 2020 at 5:56 PM
    #12
    rflay

    rflay [OP] Member

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    It was wet with water, I replaced it with the new sensor..........so far, so good.
     

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