My 2019 just had the starter battery replaced. It showed the error of OK TO DRIVE WITH CAUTION, TRACTION BATTERY FAULT. I agree it‘d be great if it showed low 12v battery instead of a number of other errors. I had a 12v booster that I carry in the car for the problem thats been reported. However, this time last tI’ve I had to have both 12v batteries jumped in order to avoid a tow. Auxiliary battery was replaced 6 months ago, would have been nice if dealer would had replaced starter battery then.