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Quick Links: Fuel door flapping Which replacement fuel pump? Catalytic converter question. Exhaust system recommendations Head Gaskets: are they bad? Mixing Gear Oil

A/F sensor question

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

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Jul 6, 2025 at 7:22 PM

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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.

Last edited: Jul 6, 2025 at 8:15 PM

fholl29, Jul 6, 2025 at 7:22 PM

#1

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