Question about 1996 Dodge Grand Caravan

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Oxygen sensor between engine an catalytic convertor.Very tight for room,have a special socket but no room for rachet or wrench.HELP!

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  • gerry bissi May 11, 2010

    may have to lower exhaust system for access. call dealer and ask if that is how they do it. service department will tell you.

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I have done this on my 3.8L. You have to remove the catalytic converter to get to it, might as well replace the converter gasket and bolts while you're at it.

Posted on Mar 17, 2009

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How do i change a oxygen sensor on my 2000 ford explorer


Determine which bank it is from the engine code and replace it with a special socket you can rent from autozone. It's located on your exhaust pipe either before or after the catalytic convertor.

Apr 15, 2016 | Ford Cars & Trucks

1 Answer

Where is the o2 sensor located on a 04 impala


You have at least two, possibly four.

If you have dual exhaust, so two catalytic converters on the car, you have 4 oxygen sensors: one for each bank of the engine and one behind each cat. An oxygen sensor after the cat is called a downstream O2 sensor, and is solely for monitoring the efficiency of the catalytic converter.
If you have single exhaust and one cat, you will have this one downstream O2 sensor behind the cat, and then you may have one or two "upstream" oxygen sensors. The upstream sensors are in the exhaust, close to the engine. If you have one for each bank of the engine, these upstream sensors may be right in each exhaust manifold on the engine, or in the exhaust pipe attached to the manifolds, but still close to the engine.
Some cars have only one sensor for the engine and one for the cat. A 2005 buick century with a 3.1L engine has only two sensors, one for the engine or one upstream sensor, and one downstream sensor.

If your Impala has only one upstream sensor, look on the back side of the engine, down low, after the exhaust pipes from the two sides connect. It should be there, the only thing sticking out of the exhaust that has wires to it. Follow the wires to the pigtail connector, if you are replacing it. Before trying to unscrew it, the exhaust should be warmed up. Not hot as in normal running temperature, but just heated up a bit. Less chance of stripping the threads if it is warm. Just don't get burned. If possible to get a wrench on it-7/8 inch open end. If no room for a wrench, stores sell a special socket to remove oxygen sensors.
The upstream oxygen sensors are what the computer reads to adjust or "trim" the amount of injected fuel for the correct air/fuel ratio.
I didn't expect to run on so long, hope you understand it. If not, or any further question, give a shout back.

Aug 30, 2014 | Cars & Trucks

1 Answer

How any oxygen sensors are on a 1999 grand cherokee laredo 4.0 & were is it/they located?


On Grand Cherokee oxygen sensor locations for 4.0 and 4.7 engines, check this diagrams...


12_18_2011_2_25_33_pm.jpg


12_18_2011_2_26_23_pm.jpg

The Oxygen Sensors (O2S) are attached to, and protrude into the vehicle exhaust system. Depending on the emission package, the vehicle may use a total of either 2 or 4 sensors.

Federal Emissions Package (4.0L and 4.7L engines):
Two sensors are used: upstream (referred to as 1/1) and downstream (referred to as 1/2). With this emission package, the upstream sensor (1/1) is located just before the main catalytic convertor. The downstream sensor (1/2) is located just after the main catalytic convertor.


California Emissions Package (4.0L engine):
On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the rear/upper upstream sensor (2/1) is located in the exhaust downpipe just before the rear mini-catalytic convertor. The front/upper upstream sensor (1/1) is located in the exhaust downpipe just before the front mini-catalytic convertor. The rear/lower downstream sensor (2/2) is located in the exhaust downpipe just after the rear mini-catalytic convertor, and before the main catalytic convertor. The front/lower downstream sensor (1/2) is located in the exhaust downpipe just after the front mini-catalytic convertor, and before the main catalytic convertor.


California Emissions Package (4.7L engine):
On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the right upstream sensor (2/1) is located in the right exhaust downpipe just before the mini-catalytic convertor. The left upstream sensor (1/1) is located in the left exhaust downpipe just before the mini-catalytic convertor. The right downstream sensor (2/2) is located in the right exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor. The left downstream sensor (1/2) is located in the left exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Dec 13, 2011 | 1999 Jeep Grand Cherokee

1 Answer

P0171


Ho Joanne:
On Grand Cherokee oxygen sensor locations for 4.0 and 4.7 engines, check this diagrams...


12_18_2011_2_25_33_pm.jpg


12_18_2011_2_26_23_pm.jpg

The Oxygen Sensors (O2S) are attached to, and protrude into the vehicle exhaust system. Depending on the emission package, the vehicle may use a total of either 2 or 4 sensors.

Federal Emissions Package (4.0L and 4.7L engines):
Two sensors are used: upstream (referred to as 1/1) and downstream (referred to as 1/2). With this emission package, the upstream sensor (1/1) is located just before the main catalytic convertor. The downstream sensor (1/2) is located just after the main catalytic convertor.


California Emissions Package (4.0L engine):
On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the rear/upper upstream sensor (2/1) is located in the exhaust downpipe just before the rear mini-catalytic convertor. The front/upper upstream sensor (1/1) is located in the exhaust downpipe just before the front mini-catalytic convertor. The rear/lower downstream sensor (2/2) is located in the exhaust downpipe just after the rear mini-catalytic convertor, and before the main catalytic convertor. The front/lower downstream sensor (1/2) is located in the exhaust downpipe just after the front mini-catalytic convertor, and before the main catalytic convertor.


California Emissions Package (4.7L engine):
On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the right upstream sensor (2/1) is located in the right exhaust downpipe just before the mini-catalytic convertor. The left upstream sensor (1/1) is located in the left exhaust downpipe just before the mini-catalytic convertor. The right downstream sensor (2/2) is located in the right exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor. The left downstream sensor (1/2) is located in the left exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Dec 13, 2011 | 1999 Jeep Grand Cherokee

2 Answers

Trying to locate my 2003 grand cherokee laredo 6 cyl, upstream oxygen sensor.


The sensor will be screwed into the exhaust pipe or manifold and will have a one wire lead attached to it. It will be forward of the catalytic convertor. A 7/8" combination wrench should remove it but a special socket (at any auto parts store) may be required.

Sep 05, 2011 | 1996 Jeep Grand Cherokee

1 Answer

I must replace the oxygen sensor in my 2001 Chevy Silverado. I found it on the front side of the catalytic conv. but the space is so tight what is the best way to remove and replace this part?


You should be able to remove it with a 7/8" combination wrench. There is also a special socket for O2's that you can purchase or maybe borrow from a parts store.

Sep 01, 2011 | 2001 Chevrolet Silverado 1500

1 Answer

I need help! need to know where Oxygen sensor is located on a 2000 ford contour 2.0L 121CI L4 DOCH. Also what tools are needed to replace it?


The Contour has two 02 sensors...post cat and pre cat, which means 1 in front of the catalytic converter and 1 behind it. An oxygen sensor wrench is the best tool to use for replacing an oxygen sensor, it is slotted on the end and will slip over the wiring harness & is designed to work in tight quarters...A 7/8" or 22mm open end wrench can be used if you have room to get it on the sensor and still turn it, without busting your knuckles---Spray some WD-40 or Liquid Wrench on the old sensor and let it soak a couple of minutes, it helps.---Autozone has the 02 tool if you need to purchase one. Good luck, i hope this helps.

Jul 17, 2011 | 2000 Ford Contour

2 Answers

2/1 oxygen sensor where is it located


The Oxygen Sensors (O2S) are attached to, and protrude into the vehicle exhaust system. Depending on the engine or emission package, the vehicle may use a total of either 2 or 4 sensors.
Federal Emission Packages : Two sensors are used: upstream (referred to as 1/1) and downstream (referred to as 1/2). With this emission package, the upstream sensor (1/1) is located just before the main catalytic convertor. The downstream sensor (1/2) is located just after the main catalytic convertor.
California Emission Packages: On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the right upstream sensor (2/1) is located in the right exhaust downpipe just before the mini-catalytic convertor. The left upstream sensor (1/1) is located in the left exhaust downpipe just before the mini-catalytic convertor. The right downstream sensor (2/2) is located in the right exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor. The left downstream sensor (1/2) is located in the left exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor.

May 19, 2011 | Jeep Grand Cherokee Cars & Trucks

2 Answers

Do i need special tools to replace 2001 Pontiac Aztek Oxygen Sensor


No special tools are needed, just use a open end wrench or adjustable wrench.

Dec 31, 2010 | 2001 Pontiac Aztek

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I have place a diagnosic monitor on my Tundra, It give me a message that I have a malfuntion in Bank 2 Sensor 1 of the heating system. In my repair manual I cannot find where bank 2 is located so I can...


There are 2 oxygen sensors on each side; bank 1 is driver side, while bank 2 is the passenger side. Sensor 1 is the one up closest to the exhaust manifold; sensor 2 is back just in front of each catalytic convertor. You can get one at AutoZone for about $90. Also you'll need a special split socket to remove the sensor. You can't remove it with a regular socket because of the wires so a split socket is used, about $10. Ask for one at the auto supply store.

Oct 26, 2009 | 2000 Toyota Tundra

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