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Check engine light O2 sensor?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Fresh Taco, Mar 20, 2013.

  1. Mar 20, 2013 at 3:28 PM
    #1
    Fresh Taco

    Fresh Taco [OP] Well-Known Member

    Joined:
    Jan 21, 2012
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    Craig
    Boston, Ma
    Vehicle:
    08 SR5 Shorty
    LCE Header, rear air bags, URD short throw shifter, AFE pro dry, 2" receiver hitch, OEM cruise control
    Hi everyone. I have a 2008 regular cab 4 cylinder 4wd with a 5 speed & 81k on the clock. I am getting fault code P0031 which I believe is a low voltage condition in the O2 sensor bank 1, sensor 1. My understanding is that this is referring to the upstream (pre cat) O2 sensor. Can anyone confirm this? Ever changed this sensor? I have found a lot of pics of the first gen sensor location, how much different is the second gen?
     
  2. Mar 20, 2013 at 3:31 PM
    #2
    2TRunner

    2TRunner Snoop Dad

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    Yes. The front O2 sensor. Its the Air/Fuel ratio sensor. Expect to pay out da' butt for a new one.

    The 02 on the 4 poppers is visable with the hood open. Look down at the exhasut manifold, and follow the exhasut down. O2 should be visable.

    I've changed mine, I have a pic on my computer, I'll post it up.

    [​IMG]

    [​IMG]
     
    Last edited: Mar 20, 2013
  3. Mar 20, 2013 at 4:03 PM
    #3
    Fresh Taco

    Fresh Taco [OP] Well-Known Member

    Joined:
    Jan 21, 2012
    Member:
    #71071
    Messages:
    45
    Gender:
    Male
    First Name:
    Craig
    Boston, Ma
    Vehicle:
    08 SR5 Shorty
    LCE Header, rear air bags, URD short throw shifter, AFE pro dry, 2" receiver hitch, OEM cruise control
    Yeah that's what I was afraid of... Looks like it is going to run me about $125 for the damn thing. Thanks for the quick response/ photo!
     
  4. Mar 20, 2013 at 4:54 PM
    #4
    2TRunner

    2TRunner Snoop Dad

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    No prob bob.

    $125? What brand? Denso?

    Those things are pretty easy to test. Simple resistance (ohms) test will show if they are bad or not. You'll have to search around for what terminals to test and what the ranges are.
     
  5. Mar 20, 2013 at 6:48 PM
    #5
    Fresh Taco

    Fresh Taco [OP] Well-Known Member

    Joined:
    Jan 21, 2012
    Member:
    #71071
    Messages:
    45
    Gender:
    Male
    First Name:
    Craig
    Boston, Ma
    Vehicle:
    08 SR5 Shorty
    LCE Header, rear air bags, URD short throw shifter, AFE pro dry, 2" receiver hitch, OEM cruise control

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