So here's a strange one. Middle of the week the other half is using the Yeti and notices the reversing sensors aren't working , no bings, no bongs, no warnings, no display on the screen. Next day and as she is driving along message pops on the radio display "reversing sensors not availiable"  with OK or Cancel she leaves it so I can maybe see it later but it just goes away. Since then driven it twice no meassage and still no parking sensors or display. I've had a good look at