Question about 2002 Chevrolet Blazer

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How do I replace the Oxygen sensor on a 2002 Chevy Blazer?

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  • yadayada
    yadayada May 11, 2010

    which sensor? what engine?

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  • Chevrolet Master
  • 1,149 Answers

Hi:
;Your Chevy Blazer has 4 oyxgen sensors, 2 on each side of the engine. First, you would want to scan the codes on your computer, to determine which sensors are failing. They are located in front of and behind the catalytic converters. Basically all you need to do is locate them, unplug the electrical harness plug, and un screw them from the exhaust pipe/ manifold that they are mounted in.

Posted on Nov 17, 2009

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  • Chevrolet Master
  • 76,846 Answers

Here is a link to a YouTube video of the job, all sensors are basically the same.

http://www.youtube.com/watch?v=LFR8Numjy7M

Posted on Nov 17, 2009

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6ya6ya
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Posted on Jan 02, 2017

  • 124 Answers

SOURCE: 2002 chevy blazer fuel pump (4 door)

yes you have to drop the tank. you will also need a fuel line tool to unhook the fuel lines. before you drop the tank see if tou can reach and wiggle the electrical connection on the top of the tank. these pumps have a pigtail issue. please rate

Posted on Dec 08, 2008

daves944
  • 1050 Answers

SOURCE: location of oxygen sensors

I think there is more than two. Either way, they are located in the exhaust system. The pre-cat sensors are in the head pipes, just below the exhaust manifold, and then there will be one right behind the catalytic converter. You will need a 7/8 inch wrench or possibly a special O2 socket.

Posted on Apr 05, 2009

  • 75 Answers

SOURCE: need to find and replace oxygen sensor for 2003 chevy ventue

Need a 7/8 open end wrench or a o2 sensor socket. Located in exhaust pipe. The one closest to the engine is Bank 1 Sensor 1. The ones located downstream and known as "Sensor 2"

Posted on Jan 06, 2010

alicantecoli
  • 22246 Answers

SOURCE: replace o2 sensor on chevy suburban

yes very easy too do ,only need a 24mm ring spanner

Posted on Apr 25, 2010

jturcotte
  • 8574 Answers

SOURCE: how many oxygen sensor on a 02 chevy blazer

Hi, there are 4 sensors on your truck--two upstream and 2 downstream. The upstream sensors are mounted in the exhaust manifolds and the downstream sensors are mounted just behind the catalytic converters. The upstream and downstream sensors are different. Bank 1 is on the driver's side and bank 2 is on the passenger's side. Please let me know if you have more questions, and thanks for using FixYa.

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Posted on Jan 01, 2011

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How many oxygen sensor on a 02 chevy blazer


Hi, there are 4 sensors on your truck--two upstream and 2 downstream. The upstream sensors are mounted in the exhaust manifolds and the downstream sensors are mounted just behind the catalytic converters. The upstream and downstream sensors are different. Bank 1 is on the driver's side and bank 2 is on the passenger's side. Please let me know if you have more questions, and thanks for using FixYa.

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1 Answer

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Mar 07, 2009 | 2002 Chevrolet Blazer

1 Answer

How do I replace the oxygen sensor in my '99 chevy blazer? Does it have to be done by a mechanic?


No all you need is oxygen sensor socket it located on the actual exhaust pipes. Its just screw in exhaust system and has an electrical plug. Very simple Good luck and thanks for using FIX YA

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2 Answers

Oxygen sensor


right in front of the catalytic converter

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2 Answers

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