Looking over the car I came across this and I wanted to see if anyone has any idea what it could be. I wanted to wait until I got a response before I reconnected it. It's on the passenger side and the car isn't throwing any codes or behaving strange although it doesn't seem to pull as hard as my stock CL-S6, it's a stock 2005 6MT that I bought back in March

 

hard to tell, but looks like it may be the VTEC solenoid valve connector. If that's it, not sure why you don't have a MIL.

 

if i were you i would plug it back in

 

yeah I have no check engine light. I was gonna plug it back in but I wanted to ask first so I don't potentially mess anything up. I mean it's been like that I'm guessing before I even bought the car almost 4 months ago lol

 

Just go ahead and plug it back in...

I'm sure the car wasn't intentionally made with connectors that were meant to be unplugged.

Looks like some kind of sensor. You said it didn't have any codes so maybe pressure sensor for AC to cycle the compressor on and off? Maybe it's some type of temperature sensor for the engine oil or transmission fluid? I'm just guessing...

I'd like to know what it is too.

 

That's the power steering pressure sensor...