With that warning, it is most likely you have too much oil in the motor. To check this you access the oil level through the dash display. The procedures to read the display are in the operator's manual. The oil is supposed to be measured at approximately 100 degrees C. If in deed it is too high, you will have to have it sucked out through a tube at the right rear of the motor or remove the drain plug and try to guess the right amount to drain, but this exposes you to the risk of being burned by the hot oil. This vehicle may not be equipped with a traditional dipstick. If you just had teh vehicle serviced and this display came on, then you should have the shop that did the work correct the level.