So i just purchased a used 2011 Juke
The key fob will only occasionally work.
The console always flashes the key symbol, which is Yellow. The Manual says this indicates that the key is not nearby (green means the battery is low).
I hold the key up to the push-start button and the car beeps, then allows me to start it. It will then start flashing the yellow key light again while i'm driving letting me know the key isn't nearby.
I tried replacing the battery just in case with my back up key fob that wasn't programmed, and this didn't fix the issue either. Google isn't turning anything up.