Oxygen sensor replacement?

The do different jobs, they do look the same but they are not interchangeable. Here is a guide to help you change them out with instructions in the diagrams below for your car.

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

Check out the diagrams (Below). Please let us know what happens.

The up stream and down stream o2 sensors are not interchangeable, if you have replaced one because of failure you do not have to change the other at the same time, if it is working, do not touch it. You just can't put them in front to back positions that's all.

See my profile. They screw in just like a spark plug.

However they have a wire to contend with, so they make a O2 tool, basically a spark plug socket with a cut-out down the side, for the wire to protrude out.

For hard to get to spots, other specialty sockets are available. Sometimes you can do it with a wrench or channel lock pliers.

Since I know little about your rig, I do not know how many you have and their locations. They are usually on the mandifold or exaust. Close to the engine. Or. Around the catylitic converter A manual would be a good investment.

When you purchase the O2, the part store guys are good about FREE CODING and which one. And where.

Please send back your results.

Love, Turddog

What codes did you get? P0171 or 174? If so check for vacuum leaks, and fuel pressure.
https://www.2carpros.com/car_repair_video/test_fuel_injection_pressure.htm
Go here and checkout our video.
You can rent the test gauge at Autozone.
Get a can of spray gumout, spray the vac lines and maniflod area, when the idle changes, youve found the leak! You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs!

Hello,

In the diagrams down below I have included a diagnostic troubleshooting flowchart from the vehicle manufacturer for both Direct Trouble Code (DTC)(s) P0135 and P0155. These flowcharts will lead you to the exact cause of the DTC(s) so you can get it fixed, and fixed right the first time.
Please go through these guides and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros

Hello again,

It's possible, but extremely unlikely. The troubleshooting guide that was sent to you earlier is what the technicians at a dealership would use to diagnose your vehicle for these DTC's. I would follow the guide and you should find the cause.

Thanks,
Alex
2CarPros

If I can jump in here, those codes are for the O2 heaters. I would check the heater wiring and ground and if okay replace the PCM. Here is a guide and the engine wiring diagrams to help confirm the failure. We had this problem on a 2005 Crown Victoria and it was the PCM.

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

Yes they could among many other things. If the o2 is faulty and detects a high fuel mixture but its actually normal and it turns down the fuel mixture it would run to lean causing that problem.

Easiest way to find out is to scan for trouble codes.

Did you check wiring, plugs. Many times, due to the heat, the wiring to the O2 sensors gets damaged.

Let me know. Also, let me know the code you get.

Have you replaced them more than once?

I wonder if you got a bad one that shorted.