Why can the Nissan Livina key unlock the door but not start the car?

[Daisy]

There are several reasons why the Nissan Livina key can unlock the door but not start the car: Battery depletion: When the voltage during startup is lower than the minimum operating voltage of the computer, the engine computer will not function, preventing the car from starting. In this case, the battery should be recharged or replaced. Spark plug failure: Spark plugs are prone to damage, and short circuits in high-voltage lines can prevent them from igniting. Additionally, poor-quality spark plugs can also cause startup failure. It is recommended to replace the spark plugs in such situations. Starting circuit malfunction: If there is only a slight click sound during startup with no further response, it is likely due to a stuck starter relay. In this case, pressing the tail of the electromagnet to force it forward can connect the starting circuit and allow the engine to start.