What does the flashing green key light on the dashboard mean?

[Joshua]

The key warning indicator (amber) may flash under the following four circumstances: 1. Dead battery: The key's battery is dead (replace the battery). 2. Undetectable: The key is out of the operational range or placed in a hard-to-detect location inside the vehicle (bring the key within the operational range to resolve this). 3. Similar key: Another manufacturer's key similar to yours is within the operational range (remove the similar key from another manufacturer from the operational range). 4. Door closed: The key was taken outside the vehicle with the ignition switch in the OFF position, and then all doors were closed (bring the key back inside the vehicle).