What are the reasons for a car not self-checking and failing to start?

[SanClara]

There are several reasons why a car may not self-check and fail to start: 1. Battery aging or dead battery: In most cases, the failure of a car to start normally is caused by a lack of power, i.e., a dead battery. If the battery is not used for a long time, it will self-discharge, and over time, the battery will lose power. Additionally, after the car engine stops working, i.e., after turning off the ignition, avoid using electrical appliances inside the car. Without the engine's power supply, prolonged use of electrical appliances such as car audio systems or headlights will deplete the battery's internal power. 2. Ignition system failure: Due to low intake air temperature in the cylinder, fuel atomization in the cylinder is poor. If there is insufficient ignition energy, it can easily lead to cylinder flooding, where excessive fuel accumulates in the cylinder, exceeding the ignition limit concentration and preventing the car from starting. 3. Frozen exhaust pipe: This situation is more likely to occur in winter when the weather is cold and temperatures are low.