it is located just behind where the exhaust pipes "y" together
Single exhaust? Look before and after the converter. O2 sensors measure oxygen content before and after flow through the converter.answerThe oxygen sensor is a spark plug shaped device that is screwed into the exhaust manifold. Answer:There is one sensor located before the cat convertor. It will be a 3 wire sensor.
The Oxygen sensor that typically on MOST vehicles is the one closest to the heat of the exhaust. Since the SL1 is a 4 cylinder engine with a single exhaust manifold, check (or replace) the FRONT oxygen sensor, which is in the exhaust manifold, just above the "headpipe". It looks a little like a sparkplug, and should be the only thing in the exhaust manifold that has a wire connected.
If you have a 2.3 or a 2.6 motor, there should just be one oxygen sensor. It will be located on the exhaust manifold. On the driver's side of the motor you should see it down by the firewall. It will have a single wire coming from it.
There are 4 oxygen sensors on the 2002 Avalanche, located on the exhaust pipes directly behind the engine. You'll have to put the truck on a rack or crawl under it to see them. Two are located on the left side of the exhaust system, with one on the engine side of the catalytic converter, and one just behind the converter. There are two more on the right side of the exhaust system in the same location: one before the catalytic converter, and one after. You'll be looking for a "tap", or an insert into your exhaust pipe, with a single wire coming out of it. The wire is connected to the oxygen sensor, which is screwed into the "tap".
The Oxygen sensor that typically on MOST vehicles is the one closest to the heat of the exhaust. Since the SL2 is a 4 cylinder engine with a single exhaust manifold, check (or replace) the FRONT oxygen sensor, which is in the exhaust manifold, just above the "headpipe". It looks a little like a sparkplug, and should be the only thing in the exhaust manifold that has a wire connected.
Follow the exhaust back, in the exhaust there should be spark plug looking sensors with a smaller single wire coming out the top, these are your oxygen sensors. Depending on year there can be one to four sensors on your auto.
There is actually two on this car. One is on the exhaust manifold with a single wire under the hood and. One is after the cat under the car
I am pretty sure there are 2 of them. They are on the exhaust near the engine and on the catalytic converter. Look for a single wire.
The O2 sensor is in the front of the engine. If you look at the exhaust manifold by the heat shield you will see it. It screws into the exhaust and has a single wire coming out of it running back toward the drivers side of the engine. Easy to change
There IS an oxygen sensor BEFORE the catalytic converter and that's the one that typically needs to be replaced. Not all vehicles have a second oxygen sensor after the catalytic converter and of those that do, it almost requires physical damage to the vehicle to damage the rear sensor. The front oxygen sensor screws into the exhaust manifold, typically right where the exhaust comes together into a single pipe. It will be a screw in device that looks similar to a spark plug and it should have 2 or more wires out the top. If you crawl under the car and look you will know for sure.
The crankshaft sensor is located on the side of the block below the exhaust manifold on the firewall side of the engine. It is held in by a single bolt. Access is quite tight but it can be replaced with the engine in the car.
They are in the exhaust pipe system, Just start at the exhaust manifolds on the engine and work your way back to the muffler, There will be none after the muffler. They are about 3 inches long and have 1 single wire going to them. I think there is 3 of them.