Error codes no 4x4 error need help plz.
 

Ok, so after a while fighting with the ISTA+ software, I was finally able to get it running. Here are the errors I got. Can anyone chime in if you have an idea of what can be causing the problem? Read somewhere that maybe the plastic gear in the transfer case can be causing the 4x4 error. Any ideas are appreciated. Thanks.

I'm no expert but can help a little. You need to have the ignition on when running the vehicle test or you get bogus error messages. So first you should "delete fault memory" and then re-run the vehicle test with the ignition on.

Then, you can select a fault and hit "calculate test plan" and it will walk you through troubleshooting. VTG: Oil Wear on my E53 required simply a transfer case fluid change and code reset.

Good luck!

Before anything I'd check the battery compartment for any leaked water.