The lock light on your dashboard could indicate a few different things, depending on the make and model of your car. For a 2004 Saturn ION, it could be one of the following:
Anti-Theft System Activated: The lock light may come on when you activate your car's anti-theft system, such as the factory-installed PASS-Key® III system in the 2004 Saturn ION. This light serves as an indicator to potential thieves that your car is protected.
Door Lock Indicator: The lock light could also function as a door lock indicator. When it's illuminated, it means that all of the doors in your car are properly closed and locked.
Immobilizer System Issue: Some Saturn vehicles have an immobilizer system that prevents unauthorized starting of the engine. If there's an issue with the immobilizer system or its components, the lock light may stay on or blink repeatedly.
If you're not sure what the lock light on your 2004 Saturn ION dashboard means, it's always a good idea to refer to your car's owner's manual for specific details. Additionally, if the light remains illuminated or behaves abnormally, it's recommended to have your vehicle inspected by a qualified mechanic or authorized Saturn dealer to identify and resolve any underlying issues.