Insufficient pedestrian warning sounds may fail to alert pedestrians of an approaching vehicle, increasing the risk of a crash.

The external pedestrian warning sound may not continuously increase in volume as vehicle speed increases, due to a software error. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 141, "Minimum Sound Requirements for Hybrid Electric Vehicles."

What to do: Book it in at your next service. There is no deadline and no charge.