Question about 2001 Chevrolet Blazer

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Looking to repalace oxygen sensors on my 2001 blazer. I don't have a repair manual but need to know the locations of them on the block.

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The o2 sensors are in the exhaust system.#1 is before the catalytic convertor and #2 is after the convertor,#1 is the most failed sensor.

Posted on Aug 29, 2010


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To whom ever responds, May u please help me find the upper and lower oxygen sensors on a 2001 blazer. 2wheel drive, four door.. Thank you

oxygen sensors are located ay either end of the cat converter/s . They are small screw in plugs with wires connected to them

May 22, 2014 | Cars & Trucks

1 Answer

See a visual diagram of heat oxygen sensor bank 1 sensor 2 for ford taurus 2001

bank 1 exhaust is the rear manifold towards the windshield side. Follow the exhaust down. There should be one oxygen sensor before the catalytic converter and a monitor after the catalytic converter. Be Careful.. they look the same.

Nov 26, 2012 | 2001 Ford Taurus

1 Answer

There is a failure in the circuit of the heated oxygen sensor-bank 1 sensor 2. I don't know how to check the fuse since I don't know where it is located.

If you're getting a code for a heated oxygen sensor circuit problem, replace the sensor. I don't think I've ever seen a fuse be the problem. Bank 1 is located at the back of the engine compartment, close to the firewall. Sensor 2 is the sensor after the catalytic converter.

Aug 25, 2011 | 2002 Buick Rendezvous

1 Answer


If single exhaust pipe, look for the bank 1 sensor 2 oxygen sensor to be either stuck into the side of the catalytic converter or just downstream of it.

If dual exhaust pipes, look for the bank 1 sensor 2 oxygen sensor to be just downstream of the catalytic converter for the bank of cylinders that contain cylinder 1.

Feb 26, 2011 | Toyota Avalon Cars & Trucks

1 Answer

Hi i'm looking for a sensor circut that is just located before the catalytic converterb i also want to know exactly were can i find that sensor in my blazer

Are you talking about the oxygen sensor there are four on your vehicle and it sounds like the one you want is bank 2 sensor 2 Its located in the y pipe derictly in front of the cataylic convertor and is what is called an upsteam sensor

Nov 17, 2010 | 1998 Chevrolet Blazer

1 Answer

Need how to and location to replace knock sensor

Im looking for the same part location on a 2002 chevy blazer. It might be under the distributer cap.

May 30, 2009 | 2001 Chevrolet Blazer

2 Answers

Location of oxygen sensor

All of your oxygen senors are located in your exhaust system they are 4 of them on this vehicle. They are all screwed in to exhaust pipes with wire connections on them. All that's needed to replace them is an oxygen sensor socket and a ratchet this can be bought at any auto parts store. Good luck and thanks for using FIX YA

Mar 25, 2009 | 2001 Chevrolet Blazer

1 Answer

2001 Blazer - engine warning light stays on

You have a problem with the O2 sensor on bank 2, bank 2 is the bank opposite the bank that #1 cylinder is in, but I would recommend that you replace the bank 1 and 2 sensors as a pair, the factory always wanted it done that way, and you know how cheap they are. The O2 or oxygen sensors are located before the catalytic convertors near the exhaust manifold, they will have anywhere from 2 to 4 wires at the connector, you may need a special socket to remove them if access is a issue. When the parts are installed, disconnect the battery for 5 minutes and that will clear the code. Good luck, don't burn yourself!

Aug 07, 2008 | 2001 Chevrolet Blazer

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