O2 sensors
Thread Starter
Safety Car
Joined: Jul 2001
Posts: 3,615
Likes: 1
From: New Lenox IL
O2 sensors
I read before that there are 3 in the system but my Haynes book only refers to one. How many are there and where are they located? I thought there was 2 on the exhaust and 1 on the air intake. Is this right?
Instructor
Joined: Nov 2002
Posts: 119
Likes: 0
From: NC
Re: O2 sensors (Lord Odin)
I have a 1995, and a 95 (OBDI) has 2 PRE cats, and ONE POST cat (emmission check only).
1996 (OBDII) has 2 of each.
In 1992 I am not sure, but I know there isnt one in the intake.
[Modified by Mongoose!, 8:22 AM 11/8/2002]
1996 (OBDII) has 2 of each.
In 1992 I am not sure, but I know there isnt one in the intake.
[Modified by Mongoose!, 8:22 AM 11/8/2002]
Thread Starter
Safety Car
Joined: Jul 2001
Posts: 3,615
Likes: 1
From: New Lenox IL
Re: O2 sensors (Mongoose!)
Hmm. I have the 2 precats but none postcat. I remember changing those two out before. I did notice something on the air intake duct though. I have no idea what it is or what it does but I just assumed it was the 3rd sensor. Kinda like a air quality sensor before it enters the engine? Guess not if the sensors are located on the exhaust. What is that for anyway?
Le Mans Master
Joined: Jul 2002
Posts: 5,818
Likes: 2
From: Alive and well in Burlington NC
Re: O2 sensors (Lord Odin)
HmmI did notice something on the air intake duct though. I have no idea what it is or what it does but I just assumed it was the 3rd sensor. Kinda like a air quality sensor before it enters the engine? Guess not if the sensors are located on the exhaust. What is that for anyway?
Thread Starter
Safety Car
Joined: Jul 2001
Posts: 3,615
Likes: 1
From: New Lenox IL
Re: O2 sensors (Steel Blue 91)
The previous owner was my dad and he did nothing to this thing. I mean NOTHING. Didn't even change spark plugs or air filter. :eek: I'll get a pic of it later to show you what I'm talking about.
Melting Slicks
Joined: Apr 2000
Posts: 3,198
Likes: 2
From: Northern CA
Re: O2 sensors (Lord Odin)
That is the IAT sensor.
Post-cat O2 sensors weren't required until OBD2 in '96. I think certain '94s or '95s may have had one post-cat sensor, but I heard it just kind of sits there and does nothing.
Post-cat O2 sensors weren't required until OBD2 in '96. I think certain '94s or '95s may have had one post-cat sensor, but I heard it just kind of sits there and does nothing.
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Melting Slicks
Joined: Jan 2000
Posts: 3,418
Likes: 1
From: NW Chicago Suburbs
Re: O2 sensors (Lord Odin)
Does the IAT sensor ever need replacing? What does it do?
Eric
Safety Car
Joined: Feb 2002
Posts: 4,212
Likes: 10
From: Sun City West Az
Re: O2 sensors (Lord Odin)
On a 92 there are two O2 sensors. They are located on the exhaust pipes just above each cat. They are the "single wire" variety (not heated).
Your picture shows the Intake Air Temp sensor. I just changed mine out (along with other sensor) last night since it was 10 yrs old. ( got a good price from Jeff Koop)..the ECM checks the MAP, CTS and the IAC for start up to set idle.
Hope this helps.
Your picture shows the Intake Air Temp sensor. I just changed mine out (along with other sensor) last night since it was 10 yrs old. ( got a good price from Jeff Koop)..the ECM checks the MAP, CTS and the IAC for start up to set idle.
Hope this helps.
