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P0420 code

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Fike, Jan 10, 2020.

Page 2 of 2
  1. Jan 17, 2020 at 2:22 PM
    #21
    Littlemule1

    #21
    Littlemule1 Well-Known Member

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    It will probably come back but it’s obviously not a major concern. Probably a lazy o2 or a aging cat.
     
    Littlemule1, Jan 17, 2020
    #21
  2. Jan 17, 2020 at 2:33 PM
    #22
    DriverSound

    #22
    DriverSound Señor Member

    Joined:
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    Too few to list.
    Certain parts of the emission system are covered differently. The cats are covered 8 years or 80K miles federally. CA has different coverages for parts.
     
    DriverSound, Jan 17, 2020
    #22
  3. Jan 17, 2020 at 2:47 PM
    #23
    Atomic

    #23
    Atomic Master Cylinder

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    13 TRD Sport Double Cab Long Bed
    I had that error. It would go away and then come back...even after driving more than 1000 miles. It was intermittent at first, but then eventually stayed on. Happened at 50000 miles or thereabouts. IMO, just replace the sensor. It was on the drivers upstream side of the exhaust before the cat. I cant remember if that is bank 0 or 1. Hard to reach from underneath but not too bad. Remember to use antiseize with the new sensor.

    There's a slotted socket tool for O2 sensors that I rented for free w/ deposit from Autozone that helped.
     
    Last edited: Jan 17, 2020
    Atomic, Jan 17, 2020
    #23
  4. Jan 18, 2020 at 5:42 AM
    #24
    fixnfly

    #24
    fixnfly Well-Known Member

    Joined:
    Oct 1, 2011
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    Mike
    S.W.PA
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    So Fike is just out of warranty according to his earlier post, that figures.
    My right side cat also failed just past warranty, thanks toyota!
     
    fixnfly, Jan 18, 2020
    #24
  5. May 10, 2020 at 10:31 AM
    #25
    Stykthyn

    #25
    Stykthyn Member

    Joined:
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    05 Tacoma prerunner
    Hey toy4me how is the Walker sensor holding up? I need to do mine, but I don't want to spend on denso since I won't be keeping the truck too much longer.
     
    Stykthyn, May 10, 2020
    #25
  6. May 10, 2020 at 3:00 PM
    #26
    Toy4me

    #26
    Toy4me Well-Known Member

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    NNJ
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    So far so good.
     
    Toy4me, May 10, 2020
    #26
Page 2 of 2

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Walker Products 250-54006 4-Wire Air/Fuel Ratio Sensor
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