2011 Toyota Prius Owners Manual - Page 540

5-2. Steps to take in an emergency Stop the vehicle immediately. A buzzer sounds and a warning message is shown on the multi-information display. The following warnings indicate 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 an abnormal engine oil pressure. The warning light may turn on if the engine oil pressure is too low. Indicates a malfunction in the hybrid system. 518 PRIUS_U (OM47685U) DVD