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Oxygen sensor replacement 2003 AC

Discussion in '1st Gen Tundras (2000-2006)' started by Voss, Feb 12, 2022.

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  1. Feb 13, 2022 at 4:21 PM
    #31
    BubbaW

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    BubbaW Blessed 2 B above Ground

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    If your scanner will read the code #, that number can help determine which side the issue exists. Your bad or unplugged AF sensor will most definitely cause an engine to shutdown.

    Symptoms of a Bad or Failing Air Fuel Ratio Sensor | YourMechanic Advice

    Correct me if wrong but you were dealing with rear sensors ?
    Rear sensors only monitor the cats efficiency and the ECM does not use it's readings in making any adjustments.
     
    Last edited: Feb 13, 2022
    BubbaW, Feb 13, 2022
    #31
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  2. Feb 13, 2022 at 4:27 PM
    #32
    FirstGenVol

    #32
    FirstGenVol Recovering mangler

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    True. I replaced all 4 but it was a rear sensor that went "bad".
     
    FirstGenVol, Feb 13, 2022
    #32
  3. Feb 13, 2022 at 6:41 PM
    #33
    NickB_01TRD

    #33
    NickB_01TRD You don't need less cars, just more driveway.

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    Unhook the problem sensor completely and see if the truck will start. Also do battery reset as others have suggested
     
    NickB_01TRD, Feb 13, 2022
    #33
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  4. Feb 13, 2022 at 7:10 PM
    #34
    Voss

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    Voss [OP] Not a new member

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    Thanks, scanner said Bank 2 sensor 1 which I believe is passenger side front sensor.
     
    Voss, Feb 13, 2022
    #34
  5. Feb 13, 2022 at 7:15 PM
    #35
    Voss

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    Voss [OP] Not a new member

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    Will do thanks for the tip
     
    Voss, Feb 13, 2022
    #35
  6. Feb 13, 2022 at 7:17 PM
    #36
    Voss

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    Voss [OP] Not a new member

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    And here I almost forgot my long lost brother goes through the same weird stuff I do lol.
     
    Voss, Feb 13, 2022
    #36
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  7. Feb 13, 2022 at 7:18 PM
    #37
    bfunke

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    bfunke Tundra Curmudgeon

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    Put one of the old ones in where the bad sensor is and see what happens.
     
    bfunke, Feb 13, 2022
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  8. Feb 13, 2022 at 8:10 PM
    #38
    Jack McCarthy

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    Jack McCarthy Working remotely from the local pub

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    If it wasn't a poor connection, swap it with the sensor you replaced to see if the truck will start up and run as @bfunke recommended. Also, there should be a spec on the expected resistance of these sensors you can measure.
     
    Jack McCarthy, Feb 13, 2022
    #38
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  9. Feb 13, 2022 at 8:17 PM
    #39
    Voss

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    Voss [OP] Not a new member

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    Ya I saved the old ones for just this occasion.
     
    Voss, Feb 13, 2022
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  10. Feb 13, 2022 at 8:19 PM
    #40
    Voss

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    Voss [OP] Not a new member

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    I’ll report back once I check but I’m positive the connections are good.
     
    Voss, Feb 13, 2022
    #40
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  11. Feb 13, 2022 at 8:39 PM
    #41
    Jack McCarthy

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    Jack McCarthy Working remotely from the local pub

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    If it's definitely looking like the new sensor is bad, you should be able to swap it with another new one from Toyota since their OEM parts warranty is typically 12 months.
     
    Jack McCarthy, Feb 13, 2022
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  12. Feb 13, 2022 at 8:47 PM
    #42
    Voss

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    Voss [OP] Not a new member

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    That’s some relief. I took so long to install these, thought maybe McGeorge wouldn’t cover them. Hopefully all works out for the best.
     
    Voss, Feb 13, 2022
    #42
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  13. Feb 14, 2022 at 2:16 PM
    #43
    Voss

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    Voss [OP] Not a new member

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    Well it’s was completely disconnected. Could’ve sworn it clicked in. All is well for now.

    appreciate the input all
     
    Voss, Feb 14, 2022
    #43
    BubbaW, Jack McCarthy, FirstGenVol and 2 others like this.
  14. Feb 14, 2022 at 2:39 PM
    #44
    shifty`

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    shifty` Goons of Hazzard

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    "Oops"

    But hey, those are the best mistakes, the ones that can be resolved in less than a minute or two, and didn't cause any obvious damage.
     
    shifty`, Feb 14, 2022
    #44
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  15. Feb 14, 2022 at 4:08 PM
    #45
    Jack McCarthy

    #45
    Jack McCarthy Working remotely from the local pub

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    Mystery solved!
     
    Jack McCarthy, Feb 14, 2022
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  16. Feb 14, 2022 at 5:25 PM
    #46
    BubbaW

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    BubbaW Blessed 2 B above Ground

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    Do you recall what the PXXX # was. Just curious what an unplugged AF sensor would record.
     
    BubbaW, Feb 14, 2022
    #46
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  17. Feb 14, 2022 at 5:27 PM
    #47
    Voss

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    Voss [OP] Not a new member

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    I don’t
     
    Voss, Feb 14, 2022
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ARES 70039-3/8" Drive by 7/8" (22mm) Offset Oxygen Sensor Socket - Wire Gate Accesses Sensor from Side, Preventing Damage to Wires
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