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A/F sensor question

Discussion in '1st Gen. Tacomas (1995-2004)' started by fholl29, Jul 6, 2025 at 7:22 PM.

  1. Jul 6, 2025 at 7:22 PM
    #1
    fholl29

    fholl29 [OP] Well-Known Member

    Joined:
    Sep 18, 2017
    Member:
    #230323
    Messages:
    66
    Gender:
    Male
    First Name:
    Forrest
    Lake Tahoe, Ca
    Vehicle:
    97 T-100 3.4L
    I recently had my check engine light pop on and threw a P1135 code. its a Manual 2001 and I'm getting some mixed info on the internet about which sensor I should be replacing here. not only that but the sheet oreilly's printed for me is also a little misleading It mentions both sensors, not sure which one to follow. can anyone help a brotha out here?

    Also, the connector coming from the sensor before the catalytic converter is for some reason mounted on top of the transmission (very hard to get to to disconnect). Anyone else run into this problem before? then again maybe I'm getting ahead of myself.

    IMG_5801.jpg
     
    Last edited: Jul 6, 2025 at 8:15 PM

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