2011 Toyota Prius Owners Manual - Page 543

5-2. Steps to take in an emergency Follow the correction procedures. After taking the specified steps to correct the suspected problem, check that the warning message turns off. Warning message Details Indicates that the engine oil is scheduled to be changed. A buzzer also sounds. Comes on approximately 4500 miles (7200 km) after the engine oil is changed. (The indicator will not work properly unless the oil maintenance data has been reset). Indicates that the engine oil should be changed. A buzzer also sounds. Comes on approximately 5000 miles (8000 km) after the engine oil is changed (and the oil maintenance data has been reset). Check and change the engine oil. 5 Correction procedure Check the engine oil, and change if necessary. (U.S.A. only) (U.S.A. only) When trouble arises 521 PRIUS_U (OM47685U) DVD