Thanks for info
I didn't mention that the RV is less than 1 year old, a 2016 model.
5,017 miles on it. Coach Net warranty expires in November.
After all the advice above I removed the extra keys and started with a single key. All systems worked. It does look like something related to ignition key. I'm trying to call Ford.
Thanks for all the help. I'll post whatever I learn.
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