Hello, I'm Danny.
As far as the light on your dash regarding the four wheel drive system it would be best to perform a CAN scan - Controller Area Network to check all the systems on your vehicle. This will include the transfer case, transmission, and differentials. Here is a tutorial showing how to perform this:
https://www.2carpros.com/articles/can-scan-controller-area-network-easy
Once you have this scan performed get back to us with any code numbers and we can then properly diagnose. Hope this helps and thanks for using 2CarPros.
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Wednesday, July 7th, 2021 AT 10:54 PM