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P0031 code

Discussion in '1st Gen. Tacomas (1995-2004)' started by Lachicory, Oct 23, 2022.

  1. Oct 23, 2022 at 8:01 PM
    #1
    Lachicory

    #1
    Lachicory [OP] Member

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    Vehicle:
    04 Tacoma automatic 3.4L 4x4
    Found it's b1s1 a/f sensor and found the location for b1s1 and b1s2 sensors. What about b2s1& b2s2 locations? Does this truck have a/f and 02 sensors on bank 1? Can't seem to locate them. Can someone help? I read somewhere that b2s1 was located driver side near the exhaust manifold?? I'm trying to replace all the a/f and 02 sensors.
     
    Lachicory, Oct 23, 2022
    #1
  2. Oct 23, 2022 at 8:02 PM
    #2
    Lachicory

    #2
    Lachicory [OP] Member

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    04 Tacoma automatic 3.4L 4x4
    Oops, I meant does it have those 2 sensors on bank2 and if so, WHERE are they?
     
    Lachicory, Oct 23, 2022
    #2
  3. Oct 23, 2022 at 8:11 PM
    #3
    TnShooter

    #3
    TnShooter The TacomaWorld Stray

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    The best I can remember, it only has 1 A/F and 1 O2.
    A/F is before the cat. O2 is after.
     
    TnShooter, Oct 23, 2022
    #3
  4. Oct 23, 2022 at 9:34 PM
    #4
    Lachicory

    #4
    Lachicory [OP] Member

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    04 Tacoma automatic 3.4L 4x4
    Thanks, I'll get those "2" sensors ordered from Rock Auto and get them swapped out ASAP.
     
    Lachicory, Oct 23, 2022
    #4
  5. Oct 23, 2022 at 9:53 PM
    #5
    02hilux

    #5
    02hilux Paved roads not required

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    Make sure to order Denso only
     
    02hilux, Oct 23, 2022
    #5
    Area51Runner likes this.
  6. Oct 23, 2022 at 10:43 PM
    #6
    Lachicory

    #6
    Lachicory [OP] Member

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    Lachicory, Oct 23, 2022
    #6
  7. Oct 23, 2022 at 10:49 PM
    #7
    Digiratus

    #7
    Digiratus Adventurer

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    Digiratus, Oct 23, 2022
    #7
  8. Oct 24, 2022 at 6:43 AM
    #8
    Lachicory

    #8
    Lachicory [OP] Member

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    04 Tacoma automatic 3.4L 4x4
    Yeah, I know, but this truck is 18 years old, I am just replacing both as a precautionary measure. You got any advise on front rotor upgrades? I've only ever replaced the pads/rotors once (2011) and due again, thought I might upgrade to something better? Or do you think better to just replace oem?
     
    Lachicory, Oct 24, 2022
    #8
  9. Oct 24, 2022 at 6:45 AM
    #9
    YotaGangYotaGang

    #9
    YotaGangYotaGang PreRunners are wannabe 4x4’s

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    A rtt i never use and 30 light bars
    its just a big hunk of metal but for the pads ii ise akebono
     
    YotaGangYotaGang, Oct 24, 2022
    #9

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Denso 234-9001 Upstream Air Fuel Ratio Oxygen Sensor with 10.6” 4-Wire Harness, for Auto Trans Equipped Vehicles
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