Help with identifying plug

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Joined
Oct 10, 2022
Threads
6
Messages
37
Location
Oklahoma
It’s on the driver side, you can see it in the middle of image. It’s always been unplugged and I have no idea what it goes to. I can get more pictures, or try to atleast.

IMG_5490.jpeg
 
That is the primary (b2s1) O2 sensor.

Impossible for it to be unplugged and truck running well and without faults
 
It’s been unplugged since I bought it back in 2022. One of the first things I did was drain and refill diff/gear box and noticed it was unplugged. I had replaced all suspension components and saw it again, figured this time I’d figure out where it went. I got my camera all up in there trying to find where it plugs into but there’s nothing.
Just to verify which plug I’m referring to, I circled it.
IMG_5542.webp
 
Ignore my previous comment. I didn't even see that one in the first photo, good thing you circled it for me. I was eyeballing the larger of the two.
The only thing I can think of that is that low on the engine on the drivers side is the AC compressor. But I can assume being in Oklahoma your's is functioning so that's probably not it either.
 
Took a peek under mine and found mine is not connected as well. It is however taped up on the bracket
so it must be specific to another power plant or component not utilized on the US trucks.
 
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