2012 Toyota Prius Owners Manual - Page 751

5-2. Steps to take in an emergency Stop the vehicle immediately. The following warning indicates the possibility of damage to the vehicle that may lead to an accident. Immediately stop the vehicle in a safe place and contact your Toyota dealer. Warning message Details Indicates a malfunction in the hybrid system A buzzer sounds in accordance with the warning message that is displayed. Indicates that the high engine coolant temperature is too high Indicates abnormal engine oil pressure A buzzer also sounds. The warning message is shown if the engine oil pressure is too low. 442