GM Recalls Volts to Fix Carbon Monoxide Threat

General Motors Co. is recalling 64,200 Chevrolet Volts in the U.S. and Canada to limit how long a parked car can be left with its electric system switched on.

The Volt's built-in piston-powered charger replenishes the car's battery. It can turn on long after the car is parked if the driver leaves the vehicle without shutting off the electric system. GM reports two injury cases where that happened in a closed garage, causing carbon monoxide to build up.

The affected 2011-2013 models already have a chime that sounds if the driver leaves the power in the "on" position. Dealers will modify the car's software to automatically switch off the car after 90 minutes.