Removal of the oxygen sensor requires a special tool that is a socket with a slot in the side to accommodate the wiring that is connected to the sensor.
Often, it will be rusted in there pretty tightly, so spraying with a good penetrating oil (that isn't WD40) and working the sensor back and forth with your ratchet will help work the oil through and loosen the rust, making it easier to remove without damage.
Run either a wire brush or a thread tap through the bung to clean the threads, then apply some high-temperature anti-seize to the new sensor's threads and insert it. Turn it in finger tight, then turn another 1/4 turn with the wrench, reconnect the wires, and start the engine.
SOURCE: Need to replace the oxygen sensor in my 2003 suburban
Ther are at leat 3 and maybe 4 o-2 sensors in that particular truck...one on each exaust pipe coming down from manifold...and one after convertor on each bank....Pass.side before convertor is bank one,sensor one ..behind convertor is bank one sensor two..drivers side before convertor is bank two,sensor one...behind convertor is bank two sensor two(If equipped with four....scan will tell you which one is bad....good luck..lee
SOURCE: oxygen sensor
seem be be having to add power steering fluid every few days. Is the power steering pump going.
SOURCE: need location of oxygen sensor
#3 - Under vehicle, passenger side, below seating area, mounted in exhaust pipe in rear of catalytic converter
#4 - Under vehicle, driver side, below seating area, mounted in exhaust pipe in rear of catalytic converter
In either case, it is mounted on the rear side of the Cat.
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SOURCE: Was told need to replace oxygen sensor (code PO150,PO400,and PO32
there are two sensors or more if it's a v 6 or v8 you have a post catalytic converter 02 sensor which is on the exhaust manifold and you have another after the catalytic converter they will be on the exhaust system in case your not sure what the exhaust system looks like, the 02 sensor looks like a spark plug it will have a quick disconnect that you have to unhook before you unscrew the sensor, 02 sensors will fail in three ways the heater burns out or the sensor gets lazy and does not cycle fast enough for the computer or gets fowled out by carbon and does not read at all, most of the time it's the sensor before the catalytic converter or on the exhaust manifold you will need to buy a special 02 sensor socket to remove it. It has a slot for the wires in it and will allow the socket to let the wires hang to one side the socket costa about $20.00 at any parts store if you have a schucks or autozone you can go there and ask them to test your car and it's free they can pull the code and tell you which one it is and point it out to you and you can buy the sensor from them once it is replaced the light will go off by itself, a heated 02 sensor costs on average $40.00 may be more or less not including sales tax.
SOURCE: how to replace an oxygen sensor
In some areas a basic 22mm wrench can be used, but if the area is tight you will need a oxygen sensor socket. It's a basic socket but has a cut down the side for the wires to fit into. Open the hood, look down at what is the manifold. You may have a piece of metal covering the sensor which is a heat shield, this will have to be removed. You will see the sensor screwed into the exhaust manifold, follow the wires where it plugs into adapter. Unplug the sensor and with it being the front sensor you should be able to use the 22mm wrench and loosen. It's best to warm the engine a little for easier removal and thread damage. Once you remove the sensor, be sure the new one has anti seize grease on the threads, this keeps the part from welding itself to the exhaust. I work for Bosch, and operate the line that produces these, so my advice is to buy the aftermarket because it's the same as the OEM. Goodluck
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