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P0420 cat code

Discussion in '4Runners' started by chazman507, Apr 2, 2024.

  1. Apr 2, 2024 at 3:10 PM
    #1
    chazman507

    chazman507 [OP] Active Member

    Joined:
    Feb 20, 2023
    Member:
    #418378
    Messages:
    38
    Gender:
    Male
    First Name:
    Chuck
    Woodstock
    Vehicle:
    2019 Tacoma TRD 4X4
    INGEN cold air intake.
    My question is, the up stream or second cat? Truck has 275k on it! And go oem or aftermarket?
     
  2. Apr 2, 2024 at 3:17 PM
    #2
    Bishop84

    Bishop84 Well-Known Member

    Joined:
    Dec 17, 2015
    Member:
    #172494
    Messages:
    10,678
    Gender:
    Male
    Primary cat thats part of the manifold.

    They are pricey but OEM is the only way to go.

    You can leave p0420 for as long as you want, it has no symptoms, but it will hide any new codes that come after.

    Last option, is a spacer for the downstream sensors. https://www.summitracing.com/parts/rnb-42002?seid=srese1

    This is a no-go in emission states/provinces, but if money is tight you can use a downstream spacer that tricks the truck into clearing the P0420, you can read up on them on 4runner pages and tacoma pages.
     

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