What does it mean that lightning is displayed on the dashboard of Chrysler 300c?

That's an engine fault indicator. Nowadays, all cars have OBD-2 system, one of which is to automatically record circuit faults or sensor faults, including abnormal conditions of actuators such as oil pump and ignition coil. When there is a fault, it will flash at a special frequency. I hope I can help you. If there is something wrong with the car, ask the car master. 4S shop professional technician, 10 minutes to solve.