[raffi007]

Hello guys

I have something weird happening
My car runs normally, no misfires or rough idle or anything.

I was checking INPA this morning and the post cat O2 sensors were reading normal as you can see in the video below

After a couple of hours i re-checked and this time the post cat O2 sensor was acting weird as you can see in the video below

Then i gave a good 2-3 revs on the car and suddenly the O2 sensor that was acting weird went back to normal

Can some1 explain what is happening ? Do i need to replace the sensor or it can be something else ?

[raffi007]

I found a Lambda Probe test in INPA and when i started it my o2 sensor post cats on Bank 2 went to zero while bank 1 stayed at 0.74.
Can some1 explain what is happening ?