Location and how to replace oxygen sensor

Tiny
DSILVA
  • MEMBER
  • 1999 PLYMOUTH GRAND VOYAGER
  • 3.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 275,000 MILES
I need to replace the oxygen sensor on my van. If possible to get the location of it and how to change. My plan is to put van up off the ground. Thank you.
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Wednesday, January 6th, 2021 AT 4:10 PM

2 Replies

Tiny
CARADIODOC
  • EXPERT
Which one? What kind of problem are you trying to solve?

The first drawing shows the front O2 sensor. It's roughly right under the front edge of the windshield. The second drawing shows the rear sensor. It's a little behind the catalytic converter.
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Wednesday, January 6th, 2021 AT 5:10 PM
Tiny
ASEMASTER6371
  • EXPERT
Good evening,

I attached the location of both O2 sensors for you.

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

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

Why are you replacing them?

Roy

The oxygen sensor is installed in the exhaust manifold .

CAUTION: Do not pull on the oxygen sensor wire when unplugging the electrical connector.

WARNING: THE EXHAUST MANIFOLD AND CATALYTIC CONVERTER MAY BE EXTREMELY HOT. USE CARE WHEN SERVICING THE OXYGEN SENSOR.

REMOVAL
1. Raise and support vehicle.
2. Unplug oxygen sensor electrical connector.
3. Use a socket such as Snap-On YA8875 or equivalent to remove sensor.
4. When the sensor is removed, the exhaust manifold threads must be cleaned with an 18 mm X 1.5 + 6E tap. If using original sensor, coat the threads with Loctite 771-64 anti-seize compound or equivalent.

INSTALLATION
1. Reverse removal procedure to install a new sensor.
New sensors are packaged with compound on the threads and no additional compound is required. The sensor must be tightened to 27 Nm (20 ft. lbs.) torque.

REMOVAL
1. Raise and support vehicle.

WARNING: THE EXHAUST MANIFOLD MAY BE EXTREMELY HOT. USE CARE WHEN SERVICING THE OXYGEN SENSOR.

Oxygen Sensor Grommet Cover
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2. Remove grommet cover to expose connector.

Oxygen Sensor Connector Locking Tab
imageOpen In New TabZoom/Print

3. Push locking tab back and unplug oxygen sensor electrical connector.

Oxygen Sensor Removal/Installation
imageOpen In New TabZoom/Print

4. Use a socket such as Snap-On YA8875 or equivalent to remove sensor.
5. When the sensor is removed, the exhaust manifold threads must be cleaned with an 18 mm X 1.5 + 6E tap. If using original sensor, coat the threads with Loctite 771-64 anti-seize compound or equivalent.

INSTALLATION
1. Reverse removal procedure to install a new sensor.
New sensors are packaged with compound on the threads and no additional compound is required. The sensor must be tightened to 27 Nm (20 ft. lbs.) torque.
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Wednesday, January 6th, 2021 AT 5:16 PM

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