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Check Engine code P0031

Discussion in '1st Gen. Tacomas (1995-2004)' started by JT1521, Jul 1, 2014.

  1. Jul 1, 2014 at 5:51 PM
    #1
    JT1521

    JT1521 [OP] Well-Known Member

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    Hi I am just curious what is the OEM part that I need to fix this Check Engine code P0031? I have a 2003 Tacoma SR5, 3.4 liter, Auto Transmission. Thanks.
     
  2. Jul 3, 2014 at 4:57 AM
    #2
    LarryInSC

    LarryInSC Member

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    You need to replace the front oxygen sensor, which is about $125-150 if you do it yourself. It'll take you about 20-25 minutes. Very easy.

    --Larry in SC
     
  3. Jul 5, 2014 at 12:56 AM
    #3
    JT1521

    JT1521 [OP] Well-Known Member

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    Thank you. Could you direct me to a site with the right sensor I would need? I would prefer a Denso one. I think that is what is on there now.
     
  4. Jul 7, 2014 at 2:22 PM
    #4
    JT1521

    JT1521 [OP] Well-Known Member

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    Bump
     
  5. Jul 7, 2014 at 3:14 PM
    #5
    lipster

    lipster Well-Known Member

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    Well, of course there is your friendly nearby dealer, Napa, Ebay, Amazon.
     
  6. Jul 9, 2014 at 3:05 PM
    #6
    JT1521

    JT1521 [OP] Well-Known Member

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    Would the exact part I would need be a Denso 234-9001 Air Fuel Ratio Sensor? Thanks.
     
  7. Jul 12, 2014 at 6:30 AM
    #7
    JT1521

    JT1521 [OP] Well-Known Member

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  8. Jul 12, 2014 at 3:29 PM
    #8
    Mainmoe02

    Mainmoe02 Well-Known Member

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  9. Jul 12, 2014 at 4:03 PM
    #9
    JT1521

    JT1521 [OP] Well-Known Member

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    All I wanna know right now is the part number I need to replace it with. thanks
     
  10. Jul 12, 2014 at 4:26 PM
    #10
    Mainmoe02

    Mainmoe02 Well-Known Member

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    You already got that 3 posts above.
     
  11. Jul 12, 2014 at 5:34 PM
    #11
    JT1521

    JT1521 [OP] Well-Known Member

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    I did? I am the one that asked if the Denso 234-9001 Air Fuel Ratio Sensor was the exact part. Nobody has confirmed it yet.
     
  12. Jul 12, 2014 at 7:30 PM
    #12
    NOLA ItsNotOva

    NOLA ItsNotOva Well-Known Member

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    RockAuto will tell you which oxygen sensor will work with your truck. If you cant figure it out, give the service people a ring and they'll do everything for you.
     
  13. Jul 12, 2014 at 11:07 PM
    #13
    Mainmoe02

    Mainmoe02 Well-Known Member

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    I'll confirm it for you, yes that's the correct part number for the A/F sensor. And never mind, rock auto doesn't have the best prices. Go to your local auto parts store and buy their denso AF sensor. I'm sure they have the best price for you
     
  14. Jul 13, 2014 at 7:51 AM
    #14
    JT1521

    JT1521 [OP] Well-Known Member

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    My local parts stores want 173.99 for it. I could get it on Amazon for 107.66 free shipping.
    http://www.amazon.com/Denso-234-9001-Fuel-Ratio-Sensor/dp/B000C5WD2Q
     
    Last edited by a moderator: Jan 19, 2016
  15. Jul 25, 2015 at 5:12 PM
    #15
    MD11Fr8Dog

    MD11Fr8Dog Well-Known Member

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    Last edited by a moderator: Jan 19, 2016
  16. Jul 25, 2015 at 11:43 PM
    #16
    otis24

    otis24 Hard Shell Taco

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  17. Aug 3, 2015 at 3:26 PM
    #17
    MD11Fr8Dog

    MD11Fr8Dog Well-Known Member

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    Easy fix. Took 15mins time. Tools required - 12mm socket to remove 2 nuts and a straight slot screwdriver to release the tab on the electrical connector. I had some PB Blaster standing by, but the 12 yr old (110k miles) nuts came right off.

    CEL
    87d65067b0ec115ef2f2324ee82961eb_42f4d0b8629b6323fb4b082591fca20e409eb7aa.jpg

    New O2 sensor
    716ffd467a1555b86cd02707056b5adb_7e3c6a14772c7a4c0e0c0325a4aa842d5a1d7ffa.jpg

    Old sensor through the wheel well
    e64f09d51134213055d6657895e096f5_df7c1471bf13f38055b3d3ae3f9c5ccefab2a327.jpg

    From underneath
    ef7a4c22d435fd3281dc5eb5962ff072_1ea44c2421018747089b9da0c0cd519833f46002.jpg

    Old sensor out
    abf4090a0db15d025633bc0a18d0e781_b561a72e740ef84cb3d72e0608337916a7050c51.jpg

    New sensor in
    b77aea89f60f5a7ffb76c609718c7361_cdf434b2d31c61f394783ade594205153a044cbf.jpg

    CEL gone
    4e7feb8c0b6183351150d26a702d3417_d70d4f66a6af1d9888256b9d9670951ad96e68f2.jpg
     
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