Malfunctioning LKA malfunction warning

[schrob1]

2016 LX 450H bagan issuing intermittent LKA warnings months ago.  No apparent degrade in performance -- everything works OK.  After shutting down, light disappears.    No good knowledge of/or guidance from dealers, though other owners report the same symptoms.  Very frustrating.  Any thoughts/ideas?

[RX400h]

Have you checked the water level in your battery? (if it's accessible)
If that's okay, how old is the battery? A week battery can cause the ECU to throw weird codes.