Question about 1991 GMC Sierra

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OXYGEN SENSOR LOCATION 91 GMC PICKUP - 1991 GMC Sierra

Posted by Anonymous on

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6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
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Posted on Jan 02, 2017

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work4it1

  • 196 Answers

SOURCE: need to know where sensor 1 (oxygen sensor) on bank 1 is located

It would be on the left header pipe as you sit in the truck. Its the sensor in front of the cat

Posted on Jan 17, 2009

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super_guy

  • 1986 Answers

SOURCE: where are the oxygen sensors located?

There will be one located before, and one located after the catalytic converter for each exhaust that you have

Posted on Sep 10, 2009

dogwood32

  • 432 Answers

SOURCE: i have a 2002 gmc sierra 1500, need to change the

There are several located within the exhaust system(PIPE)You need to know witch one.

Posted on Jan 12, 2010

markinzoo

  • 203 Answers

SOURCE: where is the oxygen sensor

there should be 2,both are in the exhaust 1 behind the cat.converter & 1 upstream
if the truck has dual exhaust it may have more than the 2.if your reading codes it will
list them as bank 1 sensor 1 or 2. sensor 1= upstream 2 = behind cat
good luck

Posted on Jun 13, 2011

elsydeon

Ryan Arbuckle

  • 44 Answers

SOURCE: I would like to know

From my research, there are multiple O2 sensors on the exhaust system. They can be found near the catalytic converter, before and after it. O2 sensors are easy to find by the wires sticking out of the exhaust system and the mounting bungs for them.

Posted on Jul 22, 2011

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Anrez, your 1991 Chevy trucks O2 sensor could be located in the Y pipe just ahead of converter or in the front portion of the converter.
Check the attached links,instruction and guides, Good luck
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Google search engine model, type and the words oxygen sensor location. The search results will provide you with both images and links to locate it on your engine.

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We have 2 locations, upstream before the CAT, and dowstream below the CAT. The upstream is on the passenger side at the exaust manifold very easy to access from the top. The downstream one is after the cat, accessible from underneath. The connector for this one is a PIA, up near the top of the tranny. But doable if you're in the right position.

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Where is the oxygen sensor located on a 92 gmc 2500


Your oxygen sensor is located between your exhaust manifold and the cad. It is a little sensor that screws into the exhaust pipe itself. There will be a wire on it which plugs into a small clip. When you see it you will know it. It is the only thing that screws right into the exhaust. I hope this helps you out.

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A friend of mine hooked up a computer to My 1992 gmc sierra pickup and got error codes 44 and 43. But is not sure what they are. Please help


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I just bought a used engine for my 1988 lincoln and its reading history codes of 91, 41, and 34. What are these codes


91 (engine running) heated oxygen sensor indicates system lean, left side
91 ( cont. memory) no heated oxygen sensor switching indicated, left side.
41 (engine running) lean right side.
41(cont. memory) no heated oxygen sensor switch,right side.
34 egr valve pressure transducer/position sensor sonic voltage above closed limit.
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1 Answer

Oxygen sensor


Hello gobabygo1, my name is JShreader. Thank you for choosing fixya.com.

There is 4 Oxygen Sensors on this model Truck. I uploaded a picture showing you exactly where each of the 4 Oxygen Sensors are located. It is in .pdf format. You can download it by clicking HERE. I hope this helps you. If you have any more questions or need any more diagrams, please don't hesitate to ask...Thanks again, JShreader!

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1 Answer

Location of oxygen sensor


The only thing that comes out of the exhaust with a wire coming from it, is the oxygen senser. It is right behind the manafold.

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2 Answers

Check Engine light flickers occasionally


Check the oxygen sensor or catalytic converter might be bad; but I would check the oxygen sensor first. Also clean the cold air intake sensor, if there is something cover it then you'll see the checkengine flickers on but your engine is running fine.

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