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O2 Sensor

Discussion in '2nd Gen. Tacomas' started by 4x4jeep, Jan 29, 2012.

  1. Jan 29, 2012 at 5:21 PM
    #1
    4x4jeep

    4x4jeep [OP] Well-Known Member

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    My truck is throwing a code for O2 Sensor. Its a 06 V6 with 65K miles. How do I know which O2 sensor to replace? Thanks
     
  2. Jan 29, 2012 at 5:22 PM
    #2
    whippersnapper02

    whippersnapper02 Well-Known Member

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    The code should tell you what sensor is going bad.
     
  3. Jan 29, 2012 at 5:25 PM
    #3
    4x4jeep

    4x4jeep [OP] Well-Known Member

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    The code is P0430
    Catalyst system efficiency below threshold
     
  4. Jan 29, 2012 at 5:27 PM
    #4
    whippersnapper02

    whippersnapper02 Well-Known Member

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    Ok sound like you may have a bad cat or cats not a bad O2 sensor.
     
  5. Jan 29, 2012 at 5:31 PM
    #5
    4x4jeep

    4x4jeep [OP] Well-Known Member

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    Yea if I reset the code it will stay off for the next few drives. I hope its not the cats they are $$$ but at least in Florida their is no smog test :rolleyes:
     
  6. Jan 29, 2012 at 5:32 PM
    #6
    whippersnapper02

    whippersnapper02 Well-Known Member

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    You probably have bad cats.
     
  7. Jan 29, 2012 at 7:01 PM
    #7
    4x4jeep

    4x4jeep [OP] Well-Known Member

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    Is their a way to test the O2 sensors?
     
  8. Jan 29, 2012 at 7:35 PM
    #8
    the.sight.picture

    the.sight.picture .45%er

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    its the passenger side downstream. P0430 is bank 2. Bank 2 = cylinder 2 side

    check for leaks before downstream 02 sensor. then if no leaks replace 02 sensor. then replace Air /fuel ( upstream sensor). if MIL doesnt go away, bad cat. also if there is bad (rotten egg smell from exhaust) smell from exhaust, its the cat. the only cat u have to worry about if there is no smog test is the manifold cat. 500$ for magnaflow direct fit manifold cat and 300-400$ for eastern direct fit manifold cat. Homework has been done.
     
  9. Jan 29, 2012 at 7:37 PM
    #9
    the.sight.picture

    the.sight.picture .45%er

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    Ometer test. test the electric waveforms based on factory service manual. Buy Ometer at wally world
    ..

    Oh and cats just dont magically go bad. Mecs say that to get more $ outta you. fixed my stuff 3 weeks ago with 02 sensrs, mecs said it was BOTH cats. so....
     
  10. Jan 29, 2012 at 7:38 PM
    #10
    4x4jeep

    4x4jeep [OP] Well-Known Member

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    Thanks exhaust smells normal. Ill check for leaks in the A.M. and replace sensors accordingly
     
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