Why can't the car start when the key is inserted?

[MacGeorge]

Here are the reasons why the car won't start when the key is inserted: 1. When the key can't be turned after insertion and the car fails to start, first check if the steering wheel is automatically locked - this is part of the car's anti-theft system. If the steering wheel is locked, simply turn the steering wheel while simultaneously turning the key to solve the problem. 2. If the key can be turned but the engine won't start, this indicates the starter motor circuit isn't engaged. The cause could be either burnt or loose contacts in the ignition switch assembly - though the key turns, the contacts don't connect, meaning the circuit remains incomplete. Additional information: A car's starting system consists of the battery, ignition switch, starter relay, and starter motor. The system's function is to convert the battery's electrical energy into mechanical energy through the starter motor to initiate engine operation.