1. Have you tried turning it off and back on again?
2. Is it plugged in?
Our original Leaf died in the garage with some sort of major problem that left it reading zero battery charge and also incapable of charging. Our dealer (the lovely Boulder Nissan) gave us a new car after trying to fix the old one for a week. Yesterday they called back with the results: one of the plastic cable connectors under the dash was only partially connected leading to intermittent problems. Clicking this connector into place resolved everything. I imagine somewhere there is now a technical service bulletin with my name on it.
Anyway I'm happy, my dealer is happy(ish), and Nissan manufacturing has a little egg on it's face. I suppose it is all part of bringing a new car to market.