Switched car on again today and same amber warning, but didn’t try to put it into drive so will see tomorrow and call garage.
Only other thing I’ve had previously was the screen freezing (which meant no changing temperature/seat heating/sat nav etc) on 3 occasions, all having been parked for a few hours in the cold (-2 to 3C range) and then trying to drive home (in the dark). Typically every time it happened I was somewhere I didn’t know and at least an hour from home, so was a nightmare without satnav (had to use google on my phone on speaker) or heating!!!
These cars definitely don’t seem to love a temperature change :/