Has the car had the instrument cluster replaced recently? I've seen incorrectly programmed clusters cause the "Display Defective" message. You'll need an SDS to check. Specifically, the "CAN ID" setting should be checked. It should be set to either "CAN ID 310" or "CAN ID 312", I don't remember which. Try both settings and see which one makes the warning message go away. Let us know what happens.