Lexus NX Error Memory Lock

I had a similar issue with my NX. Do you have any other symptoms, like the car acting strangely or any warning lights illuminated?

Interesting! No other symptoms at all, which is what's so puzzling. Just the error message about the memory lock. Was yours the same, just the error and nothing else?

Yes, that's correct. In my case it was undervoltage leading to a locked fault memory. I would suggest getting the computer system diagnosed at a professional workshop.

Thanks for the info! I had it checked out. Turns out it was indeed undervoltage. Repair cost was 240€. Appreciate the help!