Good morning,
Had a similar message/problem on my plus 6 two days ago.
Red stop sign, turned off and restarted.
When restarted the yellow check engine light came on.
Dealer thought battery discharge may be causing the problem and advice was disconnect battery and put on charge.
That didn’t fix it but I discovered two things.
Battery clamps were finger tight and put on dry which I dislike.
Vaseline, cleaned and tightened properly still no joy but was a breakdown waiting to happen.
Car has only done 500 miles!
Read the OBD port and found the VSS sensor on gearbox was causing the problem, use BMW B58 to access.
Nothing obvious on inspection.’
Car going to dealer but has anyone else had VSS problems?
Interesting reading the ECU I am getting an impressive 22mpg,
Norway in May might be interesting with a just over 200 mile range.