2011 Toyota Prius Owners Manual - Page 550

5-2. Steps to take in an emergency Interior buzzer Exterior buzzer Warning message Details The electronic key has been taken outside the vehicle and the doors have been locked without first turning the "POWER" switch to OFF. (vehicles with entry function) Correction procedure Once Continuous (Displayed alternately) (Flashes) Turn the "POWER" switch to OFF and lock the doors again. 528 PRIUS_U (OM47685U) DVD