hi, i also had my washer fluid light come on even though my tank had washer fluid in it . come to find out that if you use rain x windshield washer fluid it can cause your washer light to come on like mine did . the dealer drained the washer fluid i put in which was rain x and replaced it with a regular washer fluid and my problem was solved . dealer told me not to use any washer fluid that has additives like rain x or your washer light could come on as the cause of using a rain x style washer fluid. just use regular windshield washer fluid .