TL* THE CONTACT OWNS A 2014 HYUNDAI SONATA. THE CONTACT STATED THAT THE KEYLESS START FUNCTIONALITY DID NOT PERFORM AS INTENDED, WHICH RESULTED IN CARBON MONOXIDE SPREADING THROUGHOUT THE RESIDENCE. WHEN THE VEHICLE WAS PURCHASED, THE DEALER INFORMED THE CONTACT THAT THE KEYLESS START SYSTEM IN THE VEHICLE HAD AN IDLE TIMER THAT WAS SUPPOSED TO SHUT THE VEHICLE OFF WHEN IDLING FOR A PERIOD OF TIME. THE CONTACT REQUIRED MEDICAL ATTENTION AND THE PHYSICIAN DIAGNOSED THAT THE CONTACT HAD CARBON MONOXIDE POISONING. THE VEHICLE WAS NOT DIAGNOSED. THE MANUFACTURER WAS NOT MADE AWARE OF THE ISSUE. THE APPROXIMATE FAILURE MILEAGE WAS 11,485. MA 10/16/15 THE CONSUMER STATED HE WAS TOLD, SINCE THE VEHICLE HAD A START BUTTON, IF LEFT IN PARK, IT WOULD SHUT OFF ON ITS OWN. UPDATED 12/10/15. *JB