While traveling on interstate at70 mph a red triangle appears on dash engine turns off warning on dash to stop asap. All you have is electrical power which is not much. Car needs to be turned off and restarted. This may occur again in a few minutes or not. Took to dealer they said they replaced an O2 sensor. It still turns off. Back to dealer. They cant reproduce. Has happened to me at least 8 times on surface streets and highways. Extremely dangerous to loose power on highways. This started about 6 months ago. Still happening. Last incident was today