General Motors Quietly Installs Keyless Engine Shutoff

In 2011, when the National Highway Traffic Safety Administration was considering countermeasures to the carbon monoxide hazard introduced by keyless ignition systems, it flat out rejected the idea of an automatic engine shut-off.  The agency argued that there was no good way to come up with a rule that would include a set time for the engine to shut itself off if the driver exited with the fob and inadvertently left the engine running.