Long story short a friend of mine who teaches mechanics at a local tech school, hooked me up when my 5R55e took a poop on me, $60 later for the parts only it's freshly rebuilt with pretty much all new everything minus the solenoids on the side of the trans that work the valve body? Anyway, it has taken like 4 months to get it done and back though, and I hurt my shoulder so I only recently have been able with a friends help to get the transmission married back up to the engine. Everything has been going pretty well, torquing everything to spec and all that. BUT there's a problem, I don't want to proceed until I can figure out where this one grey plug goes, that I don't remember and there's no obvious place for it to go that I can see....

See that partially busted grey plug (yeah that's my fault, it got between the bell housing and the engine ) What does this go too???


unknown plug

 

I'm an idiot, I'm used to working on older OBD1 90's vehicles. I was thinking there was only 2 O2 Sensors and forgot OBD2 systems have a third one for behind the CAT.