2011 Toyota Prius Owners Manual - Page 553

5-2. Steps to take in an emergency Interior buzzer Exterior buzzer Warning message Details The electronic key does not operate properly. Correction procedure Once ⎯ (Flashes) →P. 550 ⎯ ⎯ Power was turned off due to the automatic power off function. Next time when starting the hybrid system, increase the engine speed slightly and maintain that level for approximately 5 minutes to recharge the battery. NOTICE 5 n While the engine oil level warning is displayed Continued engine operation with low engine oil will damage the engine. n Engine oil maintenance message The warning message is based on the projected driving range after engine oil maintenance message is reset. The system does not monitor the purity of the engine oil. When trouble arises 531 PRIUS_U (OM47685U) DVD