One problem related to abs brake fail has been reported for the 2012 Chevrolet Volt. The most recently reported issues are listed below.
On 5-21-14 I was driving 25 mph when I had to do an panic stop to avoid another car. At this point the car lost all power and my brakes went to floor. I missed hitting the other car by inches. Once I restarted the Volt it came up with a dash warning to "service brakes". I drove about 20 mph for 1 mile to find a safe place to pull over and park. All the while testing my brakes and they were very mushy. Once I pulled over and stopped another warning message came up on dash saying "abs failure". I called aaa and had car taken to dealership. It has now been at dealership for 21 days and still counting without even one update from dealership. Once at dealership the car acted normal as if nothing was wrong.