Joined: Oct 2011
Location: Peoria, Arizona
my '08 has the same plug. The wire comes off the connector, goes down past the thermostat housing and heads back on top of the engine block under the intake plenum. It might go to a temp or oil sensor? I cant see the end of it without removing the plenum, sorry. I wiggled the wire and can't see where it comes out of the back of the block, so it must end up under the plenum somewhere on top of the block. It is quite long, maybe the cut end is laying on top of the block and you can fish it out.
If you end up removing the plenum to find it, let me know where it goes, I'm curious.