I decided to replace my down stream cat O2 sensor. I didn't have any error codes but I decided to try it anyways. I purchased the downstream Bosch Universal one today and installed it. White to White (times 2), Black to Black, and Gray to Gray. I turned it on and I get a code now. I said maybe it might be a bad one from the store so I brought my car to advance auto parts and they pulled up Bank 1 Sensor 2. I purchased another one to install and the same thing. I also installed a new primary O2 sensor as well but it seems like it works fine because the car drives normal. My car is a 2000 anyone with any ideas? Did I put the wrong wires together?

 

What DTC do you have?

 

The guy at advanced auto said it didn't show. He said it showed bank 1 sensor 2. I'm thinking I am going to another one tomorrow morning to try again. If my primary o2 sensor was bad, would my car be running normal?

I think I am going to invest in an ODB2 scanner tomorrow as well.

 

How much did it run you? Did you have a test pipe on your car?

 

Get the code 1st instead of guessing.

 

No test pipe at all. How much did what cost?

 

Oh thanks. I was asking how much did the oxygen sensor.

 

I have a rear o2 sensor for sale in the classifieds. If you need it I can give it to you for a good price.

 

I got it rescan and its a P0141. Did I wire it wrong? I tried 2 brand new sensors. Both the harness and the bosch oxygen sensor was 2 white wires, 1 gray wire, and 1 black wire.

 

try OEM....I tried a new non oem sensor a while back...didn't work so well, switched back to old OEM