What Causes a Car to Not Shut Off?

[McAurora]

The inability to shut off the engine with a push-button start is mainly caused by issues with the push-button start control module. Additionally, it's necessary to check if there is a short circuit in the main relay. You should promptly visit an after-sales service for inspection and troubleshooting. If the car is still under warranty, this can be handled for free. Functions of Push-Button Start: The intelligent system of push-button start includes the following functions: automatic unlocking, automatic locking, automatic window closing, automatic anti-theft, one-button start, one-button shut-off, automatic locking before driving, automatic unlocking when parking and shutting off the engine, and trunk opening. Advantages of Push-Button Start: When the owner approaches the vehicle within about 3 meters, the door locks automatically unlock, disabling the anti-theft system. When the owner leaves the vehicle, the door locks automatically lock and activate the anti-theft system. When the owner enters the vehicle, simply pressing the start button is enough for keyless operation.

[LeLyla]

Once my car wouldn't shut off—the engine kept running even after removing the key. The issue likely stemmed from either the engine control module or the ignition system. A faulty module can trick the computer into thinking it needs to keep running, while a worn or stuck ignition switch may render key removal ineffective. Electrical shorts pose a major hazard, such as when damaged wiring allows current to bypass the switch, keeping the engine powered. Improper idle adjustment or loose battery terminals can also cause this problem. My advice: first turn off all electrical loads like the AC and try removing/reinserting the key multiple times. If that fails, safely pull over and wait for the engine to stall naturally or disconnect the battery's negative terminal. Regular professional inspections of the ECU system and ignition components can effectively prevent such failures, avoiding increased fuel consumption and mechanical damage.

[Faith]

My personal experience: A while ago, while driving, the engine wouldn't stop when I turned off the ignition, which really freaked me out. It turned out to be either the fuel pump continuing to operate non-stop or debris stuck in the keyhole making it unresponsive. Another common cause is relay burnout or poor wiring contact leading to electrical leakage. I panicked at the time, but thankfully a friend reminded me to turn off the engine's main power switch to resolve it. This issue often stems from improper modifications like adding extra circuits that cause interference, or lack of regular maintenance leading to sensor failure. Safety tip: If the engine fails to shut off while driving, immediately turn on the hazard lights and pull over. Avoid forcing any operations to prevent damaging components. Afterwards, be sure to visit a repair shop to check the relays and control system, and develop the good habit of regularly cleaning the key slot to reduce risks.

[AnnaFitz]

There are various reasons why a car won't turn off, primarily due to ignition system malfunctions. Examples include an unresponsive switch; incorrect control by the engine computer; short circuits bypassing control pathways; or an idle speed set too high. Other causes could be abnormal fuel supply or battery issues. In such situations, prioritize safety and remain calm. Check if the key inserts and removes smoothly, and observe whether the engine RPM shows any abnormalities. Suggested actions: wait for the engine to cool down or disconnect the power source. Regular maintenance of ignition-related components can help prevent such issues.