The manual says 2 things about oil engine oil level, 1) don't run the engine if the oil level is below the fill mark. 2) don't run the engine if the oil level is above the full mark. If oil level is above the full mark, drain some oil to bring the level between the full and low marks. Evidently you can do damage with too much oil. So how is your oil level, is it too high? Both cases could turn the light on.