Honda foreman oil light stays on

have an 02 honda foreman 450 es. When you first turn the key on the oil light is supposed to glow red for a few seconds and then go off even if you don't start the machine. Well this one, the oil light comes on and stays on for minutes when the unit is cold, even if you don't start it, or if you do start it. I replaced the oil sender in the bottom of the block. still does it. When the unit has run for several minutes the light will off, or if you turn the key on and not start the unit but let it set there for 2 min. or so then the light will go off. Its not oil pressure that is making this light go off, but what is. I have a nother machine just like it and it does not act this way. What the heck could be going on here? any thoughts would help. Thanks Todd
 
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