P1860 code

Hey Guys,
I have had this code pop up a few times now. It's not a continuous problem. I have cleared it and usually stay off for while, but this is the third time it's come on. I'm wondering if the Intercepter module is starting to go or if it's really a sensor in the tranny ? Anyone have a idea? I'll check the intercepter to see if there is any problems or if connections are causing it. It did first come on in the rain but the other 2 times it's been dry.