General Motors (GM) has announced a customer satisfaction campaign affecting approximately four thousand 2013 Chevrolet Volt electric cars. A software glitch in the delayed charging function could cause the vehicle to unexpectedly stall. Drivers will still have steering and brakes, but in order to restart the engine, they must stop the vehicle, turn it off, and wait five minutes before restarting.

According to GM spokeswoman, Michelle Malcho, the glitch only affects the small number of owners that have used the delayed charging option. All drivers are recommended to switch to immediate instead of delayed time charging until the problem can be fixed. GM has already sent letters by Federal Express explaining to customers that the repair requires the vehicle’s control system software to be re-flashed. The repair is expected to take less than an hour.