Engine was overheating due to a defective head gasket. “The head gasket provides a seal that keeps that pressure contained within the engine’s cylinder. The head gasket also provides a seal for internal engine water and oil passages“ (Honda). I have found hundreds of others with similar defects for the Honda 2017-2018 1.5L engines. I had no warning until the engine was too hot and the car alerted me to pull over to cool the engine. Car is regularly serviced by Honda dealership.