What does engine anti-theft authentication failure mean?
2 Answers
Engine anti-theft authentication failure means that the car key is not detected. This situation mostly occurs because the car key has no power or there is a problem with the receiving module. When encountering this situation, the car owner should check the car key. The remote key of a car has a module specifically designed to start the engine. If the key has power but this module is damaged, the engine cannot be started. If the vehicle is equipped with a one-button start system, the engine can be started without inserting the key after getting into the car. Vehicles equipped with this system have a special position inside the car to sense the key. When the key has no power, the key can be placed in this sensing position to start the engine.
I encountered the same situation last time I drove. The car wouldn't start in the mall's underground parking, and the dashboard showed this anti-theft authentication failure message. Simply put, the car's anti-theft system didn't recognize the key. Nowadays, car keys have hidden chips inside that need to successfully pair with the car to start the engine. Most likely, the key battery is dead—these small button batteries need replacement every year or two. Or maybe the key was dropped and the chip got damaged, or there's signal interference nearby. Last time, using the spare key solved the issue, so now I make it a habit to carry two keys when going out. If all else fails, you'll have to call the 4S店 to unlock it, though they always recommend a full vehicle inspection—but checking the wiring can be reassuring.
