If the automobile engine fuel is not sufficient to produce carbon monoxide, the gas mobility is poor, the harmful gases can not be excluded from the car, the passengers through the respiratory tract of the inhalation and led to the phenomenon of poisoning. Mainly because of carbon monoxide and hemoglobin affinity than oxygen and hemoglobin affinity is high, thus leading to poisoning. The principle of carbon monoxide poisoning is that carbon monoxide can be combined with the hemoglobin of the red blood cells in the body, competitively inhibiting the combination of hemoglobin and oxygen, resulting in the red blood cells can not carry oxygen, resulting in organs, tissues, and cells hypoxia. Carbon monoxide poisoning usually manifests itself as nausea, dizziness, and vomiting. If left untreated, neurological symptoms such as impaired consciousness and even life-threatening symptoms may occur when the poisoning is severe. When carbon monoxide poisoning occurs, you should ventilate the environment or leave the environment where carbon monoxide gathers as soon as possible, and seek medical treatment in time to avoid delaying your condition.