There shouldn't be one above the spark plugs. Can you take a picture of what you are seeing and upload it for me?
The one after the catalytic converter is actually in the intermediate pipe. If you look that the converter, you will see where it flanges and bolts to the intermediate pipe. At the beginning of the intermediate.
In the first picture above, sensor 1 is shows or identified with a number 2. The one after the converter is sensor 2.
I attached two pics. In the first one, I circled the two sensors and identified which is sensor 1 and which is 2. In the second pic, I copied and pasted from the removal and replacement page. You will see that it only indicates two.
I have to be honest, I have seen sensors in the converter, but not this vehicle. However, as soon as I say it, I'll be wrong. LOL If I am, the manual is wrong, too. LOL
Please feel free to let me know if I can help.
Images (Click to enlarge)
Saturday, May 8th, 2021 AT 1:21 PM