There is a resistance chip on the key of the ignition switch of the electric injector, and the precision resistance is accurate to 1\/10,000 of the resistance value has been entered into the computer in advance. If the key is broken, that is, the resistance convex (chip) is knocked out, the ECU cannot recognize it, so the computer stops supplying fuel and power, the car cannot start or the fire can be put out as soon as the car is loaded. Some car keys can also lock the steering wheel, this is ----VATS computer vehicle anti-theft system. Therefore, the ignition key of the electric injector can neither be thrown nor can be formulated by itself. If the key is broken or lost, the code number of the original key should be told to the 4S shop, so that the 4S shop and the manufacturer (manufacturer) can solve the problem. My dear friends, my answer could help you.