Why can the Nissan Livina key unlock the door but not start the car?
2 Answers
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.
I've encountered many Nissan Livina owners with similar issues where the key can unlock the doors but fails to start the engine. This is mostly due to the key battery running low. When the battery is weak, the remote signal is sufficient to unlock the doors, but starting the engine requires stronger confirmation from the anti-theft system, resulting in a higher failure rate. I would recommend first trying a new CR2032 battery, which can be purchased at supermarkets or auto shops. If replacing the battery doesn't solve the problem, it might be due to the vehicle's main battery being low on charge—check if the voltage is below 12V using a multimeter or try jump-starting as an emergency measure. Another common cause is a fault in the anti-theft system, such as a loose or aging antenna sensor, which requires professional scanning for error codes. Avoid forcing the engine to start to prevent damage to the ignition system, and promptly visit a repair shop for a thorough and safe inspection.
