Normally this means there is a code that is related to the transfer case system. So let's start with checking for codes.
https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing
Once we know what codes are there we can make a clear determination but the most common cause of this is an encoder issue. I am attaching the info about this below if that is what it proves out to be.
Let us know what codes are there and we can go through the testing needed to prove out what it is. Thanks
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Saturday, January 30th, 2021 AT 1:01 PM