Abstract: A method, system and apparatus for detecting dangerous levels of carbon monoxide and alert the occupants of a vehicle is disclosed. In various embodiments, the ambient air gaseous composition detector warns the occupants of the vehicle once the carbon monoxide composition of the vehicle's ambient air reaches a level deemed dangerous. Additionally, the device locates the closest fire department central stations or emergency company stations and sends notifications to the fire department. The device also has a locator service, which directs the emergency responders to the location of the vehicle.