Continuous alarm at startup - How to fix

[DF204FSX 0]

Hi all, I've had no issues with my 2012 Monterey 204FSX with about 150 hrs on the engine.  Recently, the normal alarm that starts when you turn the key but turns off when the motor starts has ran continuously.  All sensors are normal - oil, temperature, etc.  The beep keeps ringing, but when you push the throttle forward a certain amount, the beeping stops.  it stays off.  then when you slow down, moving throttle to 'no wake' position, it stays off for a while but then starts ringing.  again, the ringing goes off when you throttle up.  

Any ideas?  I don't know where to even start. considering just pulling the wire for the alarm.

thanks

Doug

[Rick9 0]

I don't know  much, but I'd pay a tech or mechanic to plug in a code reader and see what it says. (I assume when u say 'oil is normal', you also checked transmission/crank case oil, and that level is good too).