http://autoweek.com/article/recalls/che ... dailydrive
Functionally, this is no different than leaving a regular car idling. But the psychological issue is that in EV mode, the gas engine doesn't run until the battery is run down so some dumbasses left the ignition in run, and let the car run in a garage...until the gas engine kicked in...wtf.The issue stems from the possibility of carbon monoxide build-up in enclosed spaces when Volt drivers forget to shut off the car, which can happen when the driver accidentally leaves the car on while it's in electric mode.
Leaving the Volt powered up in electric mode will eventually drain the battery and the gas engine will kick in.
"If the gas engine runs for a long period of time within an enclosed space, such as a garage, carbon monoxide could build up," GM said.