Motormouth: Problem may stem from a weak or dying battery

Q: My 2023 GV80 has a lot of bells and whistles and one of them is the engine turning off at stop lights to save gas. I noticed that the feature had stopped working so I took the vehicle back to the dealership. Two hours after my appointment time, it was returned to me with the statement that there was no error code and there were many things that could affect that feature from operating correctly. I was surprised but they offered nothing more.