O2 sensor help - TCCoA Forums
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post #1 of 3 (permalink) Old 06-17-2004, 12:05 PM Thread Starter
Join Date: Jul 2002
Location: Norwalk, OH
Age: 36
Posts: 8
O2 sensor help

My check engine light came on and I took it to AutoZone to read the code. It came up an O2 sensor problem.

I was wondering if someone could give me a quick rundown on its location and the tools needed to change it.

It would be very much appreciated. I have a 4.6L '94 T-bird.
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post #2 of 3 (permalink) Old 06-17-2004, 12:20 PM
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Join Date: Jul 2002
Location: Saturn (or SE Michigan)
Age: 57
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Tools needed:

Oxygen sensor socket or wrench. Try a search here, since I recall a few others posting about what they used. One poster had a photo of a slim/thin box wrench, another mention a short ratchet....to assist in loosening the sensors, you may want to consider using some penetrating oil on them beforehand. Of course, you'll have to raise the car to get to them.

There are 4 of them on the 4.6L models...you'll find them in the exhaust line: one before the catalytic stuff, and one after, on each side.

Do you recall what code(s) was (were) scanned, or are you just going to replace all four, and see what happens?

From the 1994 Service Manual:

Heated Oxygen Sensor (HO2S)

Removal and Installation

NOTE: If excessive force is needed to remove heated oxygen sensor (HO2S) (9F472) , lubricate heated oxygen sensor with penetrating oil prior to removal.

--Disconnect battery ground cable (14301) .
--Disconnect heated oxygen sensors from engine control sensor wiring (12A581) .
--Raise vehicle on hoist. Refer to Section 00-02.
--Remove heated oxygen sensors from dual converter Y pipe (5F250) using Oxygen Sensor Wrench T94L-9472-A.
--To install, reverse Removal procedure. Tighten heated oxygen sensors to 36-46 Nm (26-34 lb-ft).
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post #3 of 3 (permalink) Old 06-19-2004, 04:17 AM
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Hey Norwalk

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