What are the reasons why a car cannot start?

[LeGeorge]

The reasons why a car cannot start are as follows: 1. Dead battery: Sometimes when you wake up in the morning and find that the car cannot start normally, it is likely that the trunk was not completely closed, causing the trunk light to stay on and drain the battery. 2. Spark plug failure: Spark plugs are prone to damage, and short circuits in high-voltage lines can prevent them from igniting. Another reason is that poor-quality spark plugs can also cause the car to fail to start normally. 3. Starting circuit malfunction: When starting, there is only a slight "click" sound and no further response, which is caused by a stuck starter relay. In this case, simply press the tail of the solenoid to force it forward, which will connect the starting circuit and allow the engine to start.