General Motors is recalling 50,249 Chevrolet Volts in the U.S. from the 2011-2013 model years for a software update to prevent carbon monoxide buildup when a driver forgets to shut off the vehicle.

If a driver exits the vehicle and inadvertently leaves the vehicle “on” by failing to react to cues and warning chimes emitted by the vehicle, the vehicle’s high-voltage battery will drain after a period of time and the gasoline engine will begin to run.

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 is aware of two injuries, both related to carbon monoxide build up.

The total recall population including Canada and exports is 64,186.