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All 4 O2 sensors show as bad at the same time

Discussion in '3rd Gen. Tacomas (2016-2023)' started by pltommyo, Sep 28, 2019.

  1. Sep 28, 2019 at 4:51 PM
    #1
    pltommyo

    #1
    pltommyo [OP] Well-Known Member

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    Just finished a long, moist, muddy trail run today. On thd way home MIL tripped on. ODB2 reader says all 4 O2 sensors are bad. Not likely. Thoughts on what it actually is?
     
    pltommyo, Sep 28, 2019
    #1
  2. Sep 28, 2019 at 4:57 PM
    #2
    TrdSurgie

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    TrdSurgie revised

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    Moist.
     
    TrdSurgie, Sep 28, 2019
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  3. Sep 28, 2019 at 5:02 PM
    #3
    Bishop84

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    Bishop84 Well-Known Member

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    Wash it, clear codes. Wait for them to return.
     
    Bishop84, Sep 28, 2019
    #3
    pltommyo[OP] likes this.
  4. Sep 28, 2019 at 5:04 PM
    #4
    Speedytech7

    #4
    Speedytech7 Toyota Cult Ombudsman

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    It's less Tacoma and more mod
    You have any exposed wiring or places with connectors missing? Sounds like you killed a ground for a circuit or maybe a 12v constant feed.
     
    Speedytech7, Sep 28, 2019
    #4
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  5. Sep 28, 2019 at 5:13 PM
    #5
    pltommyo

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    pltommyo [OP] Well-Known Member

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    I'll wash it well, clear the codes and see if they come back. I'll try to find a common point in wiring harness with a plug that maybe got drenched.
     
    pltommyo, Sep 28, 2019
    #5
  6. Sep 28, 2019 at 5:13 PM
    #6
    Itchyfeet

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    Itchyfeet Well-Known Member

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    I can tell you all about moist and muddy
     
    Itchyfeet, Sep 28, 2019
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  7. Sep 28, 2019 at 6:03 PM
    #7
    Dammit Evie

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    Dammit Evie Evie the Schnauzer

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    All of the above.

    Clean all4 O2 sensors including connection boots, let everything dry and reconnect.
     
    Dammit Evie, Sep 28, 2019
    #7
    nickrick78 and pltommyo[OP] like this.
  8. Sep 28, 2019 at 6:45 PM
    #8
    Woodrow F Call

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    Woodrow F Call Kindling crackles and the smoke curls up...

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    Bad ground?
     
    Woodrow F Call, Sep 28, 2019
    #8
  9. Sep 28, 2019 at 6:51 PM
    #9
    NYCTaco52

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    NYCTaco52 Half man, half goat

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    :popcorn:
     
    NYCTaco52, Sep 28, 2019
    #9
    pltommyo[OP] likes this.
  10. Sep 28, 2019 at 6:51 PM
    #10
    splitbolt

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    splitbolt Voodoo Witch Doctor

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    A/F HTR fuse or relay?

    Untitled4.jpg
     
    splitbolt, Sep 28, 2019
    #10
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  11. Sep 28, 2019 at 6:52 PM
    #11
    Skydvrr

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    Skydvrr IG: @kalopsianick

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    Well what do u mean by bad? What was the specific code? I agree, bad ground or 12v somewhere.
     
    Skydvrr, Sep 28, 2019
    #11
    Txexplorer likes this.
  12. Sep 28, 2019 at 6:57 PM
    #12
    Loco_Barbon

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    Loco_Barbon Just deez nutz hangin’ out

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    What does "bad" mean?? Are they not responsive? Heaters not working? Lazy?
     
    Loco_Barbon, Sep 28, 2019
    #12
  13. Sep 29, 2019 at 2:02 PM
    #13
    pltommyo

    #13
    pltommyo [OP] Well-Known Member

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    SSO hybrid bumper, Warn winch, RCI skid trilogy, RRW sliders, everything in the cheap/free mods thread, and of course the frame recall work.
    All 4 were showing P032 and P038. They cleared after driving a while and washing the underframe. Still have VSC and Trac lights on. Zero point reset didnt clear it. No codes.
     
    pltommyo, Sep 29, 2019
    #13

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