This feature attempts to help prevent you from locking yourself out of the vehicle if your key is still in the ignition.

When you open one of the front doors and you lock the vehicle with the power door lock control (on the driver or passenger door trim panel), all the doors will lock, then all doors will automatically unlock reminding you that your key is still in the ignition.

The vehicle can still be locked, with the key in the ignition, using the manual lock control on the door, locking the driver’s door with a key, or using the lock control on the remote entry transmitter portion of your Integrated Keyhead Transmitter.

If both front doors are closed, the vehicle can be locked from any method, regardless of whether the key is in the ignition or not.