Check Engine Light; Code 1056

[Sille Nate]

Hey guys, I'm new to this forum. I've gotten on here a few times in the past to help with my '97 probe, and I've found it very helpful.

So here I am now, hoping that maybe y'all can help me out with my problem. I have a check engine light on, and whenever I had the code pulled, it comes up 1056. I'm not exactly sure what this code is, but everytime I erase it out, it'll come back on about three or four days later.
I've also noticed that right below the air intake manifold there's a little nozzle (I guess that's what you would call it, I'm really not sure) that looks like it should have a hose attached to it...but it doesn't! There's, if I'm not mistaken, coolant on the outside of the "nozzle," but like I said, I'm not positive what exactly it is.

Please help me try and figure out what this could be so I could fix it! Thanks!!!