What are the consequences of a car accident that resulted in the death of a young man who was with me in the car, due to my loss of consciousness?

If the loss of consciousness was sudden and without any prior feeling of drowsiness, then there is nothing upon you. However, if you felt even a little drowsiness before losing consciousness, then it is considered involuntary manslaughter, which necessitates you to fast for two consecutive months, and the blood money is to be paid by the 'Aqilah (male agnates on the father’s side).