1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

o2 sensor - '06 Tacoma 4.0L

Discussion in '2nd Gen. Tacomas (2005-2015)' started by louie57h, Feb 6, 2021.

  1. Feb 6, 2021 at 7:20 PM
    #1
    louie57h

    louie57h [OP] New Member

    Joined:
    Feb 6, 2021
    Member:
    #355292
    Messages:
    2
    Gender:
    Male
    First Name:
    Louie
    Vehicle:
    2006 Tacoma v6 2 wheel drive
    Put diagnostic on truck because getting CEL. Reading is Bank 2 sensor 2 (downstream). Double checked code at Auto Zone with their diagnostic. Same code. Searched part needed using VIN#. Part number identified. From what I can tell Bank 2 is driver side because cylinder 2 is driver side. So, I need the post cat sensor for Bank 2. Part # is Denso 234-4260 or 234-4261.

    Here is the problem. When you go to buy one it says Downstream Right or Downstream Left. I have looked everywhere to see whether "Downstream Right" means as you are sitting in vehicle or looking at vehicle from front.

    ???
     
  2. Feb 6, 2021 at 10:04 PM
    #2
    RecklessTLS

    RecklessTLS Well-Known Member

    Joined:
    Jun 24, 2017
    Member:
    #222277
    Messages:
    170
    Gender:
    Male
    First Name:
    Rowdy
    Ft Collins, Colorado / Texas Native
    Vehicle:
    2009 Tacoma DCSB TRD Offroad 4.0
    TRD CAI and Exhaust,ECGS bushing, Blistien 6112 Fronts at 2.5, SPC upper arms, Bilstien 5160 Rear with 2in AAL, Interior light mod, Back up camera anytime Mod, Overhead Console Temp/Compass Fix. Leather Interior with heated seats, Weathertech floor liners, Ultraguage, Oil catch can, Smart Tap, More to come
    Rockauto is where I got my o2 sensors. Go back with denso brand. Down stream is away from engine. The upstream sensors are AFR sensors while the downstream is o2. I'd replace both if it was me if you have the extra cash. The left is driver side.
     
    winkel likes this.
  3. Feb 6, 2021 at 10:26 PM
    #3
    TnShooter

    TnShooter Well-Known Member

    Joined:
    Sep 2, 2010
    Member:
    #42625
    Messages:
    5,154
    Gender:
    Male
    Vehicle:
    07' TRD Off-Road, Auto
    STOCK
    Upstream and Downstream are commonly used to indicate what side of the converter the sensor is located. These trucks use A/F Sensor (upstream) and O2 Sensors (Downstream).
    It would be easier if they would be listed like this on retail sites.
    A lot of folks don’t know the difference, or just call then O2 sensors anyways.
    which they “kind of are” but the A/F monitors a wider range of data.
     
    winkel likes this.
  4. Feb 7, 2021 at 8:38 AM
    #4
    Wattapunk

    Wattapunk Stay lifted my friends !

    Joined:
    Jan 26, 2010
    Member:
    #30098
    Messages:
    3,443
    Gender:
    Male
    First Name:
    Uncle K
    TX
    Vehicle:
    2005 DCLB 4WD
    Standing in front of truck with hood open, Bank 2 sensor 2 is the driver's side sensor after the cat. (bank 2 refers to the bank that includes cylinder # 2, which is the cylinder closest to you on driver's side. Bank 1 is closest to you passenger side)
     
  5. Feb 7, 2021 at 8:45 AM
    #5
    Knute

    Knute Well-Known Member

    Joined:
    Aug 13, 2020
    Member:
    #337515
    Messages:
    2,639
    Gender:
    Male
    Vehicle:
    '06 4.0L Tacoma TRD Sport
    Stock, 4WD, Access Cab, White,
    I would plan on replacing both sensors. If one has failed, the other may not be much longer.

    Also, your under the truck doing the work. It only takes a little more time.
     
  6. Feb 7, 2021 at 1:04 PM
    #6
    R0dzilla75

    R0dzilla75 Well-Known Member

    Joined:
    Feb 19, 2015
    Member:
    #149038
    Messages:
    415
    Gender:
    Male
    First Name:
    Rodney
    Virginia
    Vehicle:
    05 Sport
    HID fog light 265-70-17 Firestone destination ATs Led interiors lights TRD seat covers
    The O2 sensors are cheap. The A\F one are much more expensive. I changed both of mine out many years ago when replacing my headers with DT Long tube ones.
     
  7. Feb 7, 2021 at 1:08 PM
    #7
    louie57h

    louie57h [OP] New Member

    Joined:
    Feb 6, 2021
    Member:
    #355292
    Messages:
    2
    Gender:
    Male
    First Name:
    Louie
    Vehicle:
    2006 Tacoma v6 2 wheel drive
    Thank you all. When I ran the VIN # to get the Denso part # it comes back as 234-4260 and 234-4261 for each different side downstream. So, I checked for these part #'s on Amazon and it says they are not a compatible fit. I'm more inclined to trust Denso than Amazon. I might as well do both downstream. The only difference is length of cable on each side.

    Debating whether to do upstream AFR sensors. These suckers are expensive.

    I'm going to change out the MAF while I'm at it. That's about a 2 minute job.

    Hoping downstream will come off easily if I soak with PB blaster overnight. Kid at Auto Zone was clueless as to which special slotted socket I should use. I think its 3/8 drive with 7/8 socket size but not sure.

    Thx for all the help.
     
  8. Feb 7, 2021 at 2:47 PM
    #8
    RecklessTLS

    RecklessTLS Well-Known Member

    Joined:
    Jun 24, 2017
    Member:
    #222277
    Messages:
    170
    Gender:
    Male
    First Name:
    Rowdy
    Ft Collins, Colorado / Texas Native
    Vehicle:
    2009 Tacoma DCSB TRD Offroad 4.0
    TRD CAI and Exhaust,ECGS bushing, Blistien 6112 Fronts at 2.5, SPC upper arms, Bilstien 5160 Rear with 2in AAL, Interior light mod, Back up camera anytime Mod, Overhead Console Temp/Compass Fix. Leather Interior with heated seats, Weathertech floor liners, Ultraguage, Oil catch can, Smart Tap, More to come
    When I did all my sensors about 2-3 years ago, it was around 350 for all 4.
     

Products Discussed in

To Top