What are the reasons for a car automatically stalling and failing to start?

[LaJeffrey]

The reasons for a car suddenly stalling and failing to start are as follows: 1. No fuel: Failure to observe the fuel tank usage, with the fuel gauge showing below the red line, naturally results in failure to start. 2. Dead battery: This could be due to prolonged headlight usage without turning them off, leading to battery drain, or the battery reaching the end of its lifespan. It is generally recommended to replace the battery every 2 years. Additionally, installing xenon headlights, high-power audio systems, or DVD players can also cause vehicle circuit failures. Checking for a dead battery is simple—just press the horn to find out. 3. Wrong gear: For automatic transmission cars, the gear must be in P (Park) or N (Neutral) when starting. If it's in R (Reverse) or D (Drive), the car won't start. Similarly, some manual transmission cars won't start if the clutch isn't depressed.