2012 Toyota Prius Owners Manual - Page 759

5-2. Steps to take in an emergency Interior buzzer Exterior buzzer Warning message Details The electronic key was carried outside the vehicle and the driver's door was opened and closed while the shift lever was in P without turning off the "POWER" switch. The electronic key was carried outside the vehicle and a door other than the driver's door was opened and closed while the "POWER" switch was in a mode other than off. Correction procedure Turn the "POWER" switch off or bring the electronic key back into the vehicle. Once 3 times (Flashes) Bring the electronic key back into the vehicle. 450