If under warranty I'd hope for them to replace the ECM and/or BCM first. Unfortunately I don't have enough expertise to know for certain which might be related to something like this. If not that then maybe the instrument cluster itself but I don't really know how that would be the culprit. But I guess that's possible.

I know it's frustrating but hang in there. I'm trying to deal with a difficult to diagnose issue on my wife's car right now but help from here on the forum might have shown me a light at the end of the tunnel. Let's keep our fingers crossed that we both get our fixes soon.

 

Yes. Yes. Yes. ..I took the car today to the dealer.and they admit that the instrument cluster is out of order.
They've already ordered a new one and it might arrive next week. So I will keep you posted..at last I can see the light by the end of the tunnel

 

Hooray! Your ordeal sounds maddening. Hopefully this puts it all right.