What are the causes and diagnostic methods for a car failing to start?

[AubreeRose]

The causes of a car failing to start are: 1. The battery has reached the end of its service life; 2. Electrical or electronic faults: including blown fuses, open circuits in the high-voltage coil, leakage in the distributor rotor, and damaged spark plugs. The diagnostic methods for a car failing to start are: You need to press the horn to determine whether it sounds or not. If the horn sounds, it indicates that the battery has power, and the cause of the car failing to start is other factors; if the horn does not sound, it indicates that the battery is dead or has reached the end of its service life. The owner can call the after-sales personnel of the 4S store for emergency repairs. The after-sales personnel will come to the site for inspection or battery replacement. You can also call the insurance company's customer service, inform them that the car has no power and needs rescue, and the customer service will arrange to tow the car directly to the nearest 4S store.