Fuel Flap Error

Sounds frustrating. I have a NX as well, though I won't bore you with the specifics here as I understand what you're going through! I had an incredibly similar problem with my fuel flap not opening. It was rather odd, the car acted like it was possessed. It refused to unlock sometimes and presented a myriad of unusual error messages. Does yours do this when you unlock the car with the key fob?

Yes, it happens with the key fob and the internal locks. Did you also lose other functions temporarily? How did you fix it?

Affirmative, the symptoms align precisely. The temporary loss of other functions was intermittent but definitely present. Given the error messages you are receiving and the inability to open the fuel flap, I would strongly advise against attempting any self-remedies. I would suggest that you schedule an appointment with a qualified technician. They should be able to perform a comprehensive diagnosis and pinpoint the root cause of the issue. In my case, replacing the lock actuator resolved the issue.

Thanks, that's helpful. I'm booking a diagnostic. Estimate is around 210€.