Need Help, codes are stumping me

[CARdiac]

I am really stumped and need some serious help. I keep getting a stabilitrac error (no ABS light or error). It is not when I first start the H3, it is after I drive. Could be a short distance or a long distance, but the error comes back with no rhyme or reason. It used to be an occasional thing, now it is every time I drive. The vehicle drives fine and I don't notice any shifting or performance issues, just able to spin back wheels in the rain when the light is on.
The first codes were:
C0329 Transfer case encoder circuit low
C0276 TCM communication performance
I replaced the encoder motor but still got the code:
C0276 TCM Communication performance
I took it to my mechanic and he got:
C0329 Encoder Circuit Low
U1017 Lost communication with engine control module
He cleared the codes and drove it and got:
C0276 Transmission control module communication performance
I am at a complete loss as to the cause. Please send help quickly!

 

[cgalpha08]

What do your battery terminals look like? the OEM are kinda crappy and are often times the cause of weird electrical gremlins. You could try installing new ones and seeing if that helps.

 

[alrock]

A weak battery can cause weird issues. My last one was Stab Sys and ABS issues and a new battery fixed that. Previous one caused the engine to stumble

 

[rascole]

x3 on the battery and connections.

 

[CARdiac]

Thanks for the suggestions. I found two contacts on the transfer case control module oh so slightly corroded. When I opened up the module there was a dot of corrosion, just enough to kill the unit. THis is likely from a sunroof leak 5 years ago