Had my 2015 i3 REX into the dealer two weeks ago for a checkup and was getting intermittent check engine (yellow) lamp when driving. Noticed when I dropped it off at the dealer, the check engine light was not on (of course).
They did the oil chg and fixed up my ripped front suspension boots, but couldn't find any stored codes or problems causing the yellow check engine lamp.
The yellow engine lamp is now back on 100% of the time, I checked it with my code reader - it's FFC895 "Range Extender Electrical Machine Electronics" - permanent error -- and I can't clear it.
Obvs will take it back to the dealer who is great, but out of curiosity - does anyone know what this is?