What are the reasons why the car key won't start the engine?

[EmmanuelFitz]

There are several reasons why a car key won't start the engine: 1. Steering wheel lock: When the steering wheel can't turn and the key can't be twisted, it's the vehicle's simple anti-theft function at the intersection of key unlocking and lock cylinder torque. Just gently turn the steering wheel clockwise (or counterclockwise) and lightly twist the key to unlock it. 2. Incorrect gear position: For automatic transmission vehicles, the gear must be in P (Park) position (some models include N/Neutral) to start. Some vehicles even won't allow the key to be removed unless the gear is in P position. 3. Vehicle malfunction: If the car still won't start in P position, or if the dashboard shows abnormal gear indication, it's recommended to seek immediate repair as it could indicate a faulty electronic gear sensor or electro-pneumatic valve damage.