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Oxygen sensor location and replacement instructions needed

Tiny
JUNIIR PALACIO PEREZ
  • MEMBER
  • 9 POSTS
  • 1997 CHEVROLET MALIBU
  • 3.1L
  • V6
  • 2WD
  • AUTOMATIC
  • 190,000 MILES
Trying to find the sensor inside the exhaust manifold/crossover specific to the Sfi 3100 V6 and also the wiring to the sensors.
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Saturday, May 8th, 2021 AT 1:23 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

I attached pictures of the location for the upstream and downstream O2 sensors.

https://www.2carpros.com/articles/how-an-oxygen-sensor-works

What is the issue?

https://www.2carpros.com/articles/how-to-test-an-oxygen-sensor-02-sensor

I attached the wiring for the O2 sensors. The brown wire is battery voltage for the heaters on each one.

https://www.2carpros.com/articles/how-to-check-wiring

Roy
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Saturday, May 8th, 2021 AT 1:23 PM (Merged)
Tiny
JUNIIR PALACIO PEREZ
  • MEMBER
  • 9 POSTS
I apparently have a third o2 sensor that I cannot find.
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Saturday, May 8th, 2021 AT 1:23 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
No, there is not.

There are only 2 sensors.

Why do you think there is a third sensor?

Roy
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Saturday, May 8th, 2021 AT 1:23 PM (Merged)
Tiny
JUNIIR PALACIO PEREZ
  • MEMBER
  • 9 POSTS
Crossover/ intake manifold?
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Saturday, May 8th, 2021 AT 1:23 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
No, there s no sensor there. That cross over pipe connects the front bank to the rear bank.

Roy
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Saturday, May 8th, 2021 AT 1:23 PM (Merged)
Tiny
JUNIIR PALACIO PEREZ
  • MEMBER
  • 9 POSTS
Okay, because I was at AutoZone and they have 3 different kind of sensor for my vehicle and I feel I might have got the wrong one. I can send images of these 3.
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Saturday, May 8th, 2021 AT 1:23 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Please send me the images.

Roy
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Saturday, May 8th, 2021 AT 1:23 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
I attached the pictures of the correct sensors for your car.

This is from rockauto.

Roy
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Saturday, May 8th, 2021 AT 1:23 PM (Merged)
Tiny
TANDERSON23
  • MEMBER
  • 1 POST
  • CHEVROLET MALIBU
My 98 chevy Malibu with a V6 engine or 3.1 with about 106000+ Miles on It. How Many O2 Sensors does it have?
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Saturday, May 8th, 2021 AT 1:24 PM (Merged)
Tiny
FAIRRACING31
  • MECHANIC
  • 150 POSTS
Your vehicle has two 02 sensors. One upstrem and one dowmstream.
The upstream 02 sensor is mounted in the exhaust system before the catalytic converter. The downstream is mounted in the exhaust after the catalytic converter.
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Saturday, May 8th, 2021 AT 1:24 PM (Merged)
Tiny
PAUL K.
  • MEMBER
  • 1 POST
  • 1998 CHEVROLET MALIBU
  • 4 CYL
  • FWD
  • AUTOMATIC
On a 1998 Malibu 2.4L 4cyl, to which sensor does a P0141 OBD code refer? If it's not the one after the catalytic converter, where is it located?
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Tuesday, June 8th, 2021 AT 10:40 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hello,

This means the sensor behind the catalytic converter as bad here is a guide to help you do the job and the location below for your car.

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Cheers
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Tuesday, June 8th, 2021 AT 10:40 AM (Merged)

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