1999 200 Ficht Model E200FPLEEN, while loading on the trailer the check engine buzzer goes off and the light goes on. Engine ran fine all day while fishing a tournament. Did not want to start on one occasion but started and was fine the rest of the day-no buzzers or lights. No maintenance performed prior to this, have been fishing tournaments on a weekly basis all summer. The launch was extremely busy yesterday so did not have time to research my problem. Good gas with sea foam in the tank, plenty of oil in the tank. Any suggestions as to how to attack this problem. Thank you Santa