What is the fault when the car cannot be turned off?
2 Answers
Failure to turn off the engine is due to the ignition circuit not being powered off. For keyless start models, it may be caused by a dead remote key battery or a faulty button switching circuit preventing the circuit from being cut. Below are the relevant details: 1. Keyless Start: The Keyless Start System allows starting the vehicle without taking out or turning a key. Simply keep the key in a bag or pocket, press the button inside the car, or turn the guide plate to ignite the engine. It is more convenient and significantly enhances the sense of luxury and technology. 2. Working Principle: The system uses the most advanced Radio Frequency Identification (RFID) technology, automatically unlocking and locking the doors via the chip in the smart card carried by the owner. This means when the driver approaches the vehicle within a certain distance, the door locks will automatically open and disable the anti-theft system. When the driver leaves the vehicle, the door locks will automatically lock and activate the anti-theft system. Vehicles equipped with a keyless entry system typically have a sensor button on the door handle and a keyhole as a backup in case the smart card is damaged or out of power, allowing the owner to open the door in the conventional way.
Last time my car had this issue where it wouldn't shut off, which was really startling. Normally, turning the key should stop it, but it just wouldn't obey. I figured it might be the ignition switch getting stuck or having poor contact—these parts wear out over time. It could also be that the key battery is running low, causing the vehicle's anti-theft system to misjudge and prevent shutdown, thinking someone's trying to steal the car. More seriously, if it's an issue with the electronic control module, like the engine control unit failing, then the problem is much bigger. Safety first—I immediately went to a reliable repair shop. After checking, they said it was a loose switch connection. After fixing it, they reminded me to regularly maintain the ignition system. Thinking back, it's scary—what if it had happened in a crowded place? That would've been terrible.
