Oxygen sensor replacement?

Hello,

Here is a guide and the locations of each of the oxygen sensors so you can get the job done.

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Check out the diagrams (Below)

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken

The bank 1 sensor is accessed from the top of the engine reaching over the rear, it requires a long extension and a 7/8" crowfoot or sensor socket. The bank 2 in front, is accessed from below after the lower shield is removed. The front of the frame may be lowered a bit for more access.

Spray it with some penetrant, and try it when it is warm. If it has been overtightened, the threads may have stretched. You may need a thread chaser(14mm spark plug tap) to clean the threads after removal.

If you have tried it hot, and cold, and it still won't loosen, there is not much choice but to remove the manifold. What tools are you using? It is a 7/8" hex, and a crowfoot, or sensor socket is advised. If you are not slipping around it, and you are committed to get it out, then give it all you got. I have even adapted up to 1/2" drive to break them loose. If it pulls some threads, you can use a standard spark plug thread chaser to clean the hole up.

Bank 1 is located on the side of the car engine that the #1 cylinder is on car right after the exhaust manifold before the catalytic converter. Simply unhook the wires and then simply unbolt the sensor.

See the diagram below for which cylinder is #1

The P0133 code indicates a slow response from the oxygen sensor (Bank 1 Sensor 1) in your 1996 Cadillac DeVille. This sensor is located in the exhaust system of your vehicle.

In the case of the 1996 Cadillac DeVille, Bank 1 refers to the side of the engine where Cylinder 1 is located. Sensor 1 refers to the oxygen sensor located before the catalytic converter in the exhaust stream.

To locate the Bank 1 Sensor 1 oxygen sensor in your Cadillac DeVille, you'll need to look underneath the vehicle, specifically on the exhaust manifold or exhaust pipe near the engine. The sensor is usually mounted in the exhaust system, with a wiring harness connected to it.

It's important to note that the specific location may vary slightly depending on the exact model and engine configuration of your DeVille. Consulting the vehicle's service manual or referring to online resources with detailed diagrams can provide you with more precise instructions for locating and replacing the oxygen sensor.

No connection to the issue. It is a control code for the heater in the o2 sensor only. Most likely a bad sensor and would have to be replaced.

It is on the rear exhaust manifold

Roy

Hi there,

with out knowing what brand of O2 sensor you have, theres no way of knowing what is what, even with that info I may be hard to track down the wire code. Is there anything on the package re instructions.
Mark (mhpautos)

Take it back and go get a GM one, your only going to cause problems in the long run

Do you have code #? #2 sensor is not enough info.