Oxygen Sensor locations?

Hello,

Here is a guide to help walk you through the repair with the location of the oxygen sensors in the diagrams below.

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.

I have a 2002 cavalier z24. I removed the exhaust manifold shroud to replace the O2 sensor but I don't see anything in the manifold or anything that resembles an O2 sensor??
Denny

I have a 98 cavalier and it started losing acceleration power, i would press the gas and it wouldn't go. i took it to auto zone and they ran a diagnostic on it and it said that the o2 sensor in Bank 1 Sensor 2 could be bad or had a bad connection. according to the readout they gave me it should be before the cat converter but i can't seem to find it. any help would be appreciated.

Before going any further, I need the EXACT code number to make sure you get the right sensor.

i'm not sure exaactly what code i'm looking for, on the slip they gave it me says. H02S 12 Heater condition (heated oxygen sensor Bank 1 Sensor 2)

It should be on the slip. It will start with a "P" followed by four-digit number. These are some of examples for heated oxygen sensor for Bank 1 Sensor 2. P0036 HO2S Heater Control Circuit (Bank 1 Sensor 2) P0037 HO2S Heater Control Circuit Low (Bank 1 Sensor 2) P0038 HO2S Heater Control Circuit High (Bank 1 Sensor 2) P0139 02 Sensor Circuit Slow Response (Bank 1 Sensor 2) P0140 02 Sensor Circuit No Activity Detected (Bank 1 Sensor 2) P0141 02 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2) Description: Bank 1: Bank means cylinder head. In your case, you only have one bank (Bank 1). Locate your exhaust pipe. Sensor 1 is the one by the exhaust manifold and sensor 2 is the one after the catalytic converter. Sensor 1 sometimes is also called pre-cat sensor, and Sensor 2 called post-cat sensor. You have go under the car, locate the cat in the exhaust pipe, and you should see a 4-wire sensor attached to the exhaust pipe.

Engine Performance problem
1998 Chevy Cavalier 4 cyl Front Wheel Drive Automatic
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Where is the O2 sensor and how do I replace it on my 1998 Chevy Cavalier Z24? It is a 4 cylliner 2.4 liter.

There are two of them, an upstream, which is before the converter, and a downstream which is after it. There is a scket made for the job, but they either come out easy, or very hard, the hard ones can destroy the threads. If your not equipt to deal with that, get a garage to do em...

How many O2 Sensors does this car have and where are they located?

Two. One on the bottom of the exhaust manifold and one after the catalytic converter on the exhaust system.



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I have scan showing oxy sensor faulty.
Where is the location on motor for removal and replacement of oxygen sensor. 2.2 motor, base car.
Told several models of sensors from 1 wire to four and if I can find the sensors location on the car, I can identify it from there. thank you Jeff

Your 97 Cavalier has 2 o2 sensors. One in the exhaust manifold (1 wire) and one after the catalytic converter (4 wire). The diagnostic scan should have said #1 or #2 sensor. You will need this info to proceed. Hope this helps, VIC