An amazing story. I had no idea Government Motors had even sold 64,000 of these clunkers.
"The Chevy Volt is so quiet that some people forget to shut it off. That can be dangerous when the the hybrid's gas engine kicks in and the car is parked in your garage.
It doesn't happen a lot, but General Motors is aware of two incidents when carbon monoxide buildup caused problems. It issued a recall Thursday of 64,186 Volts from model years 2011-2013.
Owners can bring the car in for a software update that will ensure that it automatically shuts off after idling for an hour and a half. Newer models already have that fix, a spokesman said.
All the Volts already sound warnings if the car is left running. It even honks at you. But apparently it's not enough of a warning sometimes.
The danger comes when the battery eventually drains. That triggers the gas engine to turn on, and if it runs for a long enough period of time in a garage, for example, carbon monoxide can build up. The gasoline engine generates electricity to drive car after the initial battery charge runs out."