The car engine P2618 Code is set many car engines by the car manufacturers. There are different numbers of motives which can reason a car engine not to begin, the most shared, of course, being a dead battery life. Pay unusual care to the sound it makes when you turn on the key. Is the car completely silent? If so, there may be a trouble with your battery terminal cable connections. Does your car eccentric over but not begin? Then it may be your spark plugs or fuel supply to your engine. In any case, if you are out on the road, try starting your car then examining the reason further when you are carefully back at home.