The check enigne light and warning buzzer activates on my 2002 225 honda comes on after you change modes of running, I can start the engine and run for anytime at an advanced rpm but when I reduce speed to a slow trolling speed the check engine light comes on and the buzzer sounds after sixty seconds, I can shut the key off and restart the enigne and no warning sound, you can run at at 1,000 rpm to 1,500 rpm and no light or warning, but if you let it idle and with no load the light and buzzer come on after a minute or two. Shut it off and restart it and it is fine. One of the tow boat operators in our area said it may be an oxygen sensor that is going bad, any ideas???
