350 MPI Horizon warning alarm beeping

1

1Moredrift

Seaman Apprentice
Joined
Feb 2, 2004
Messages
36
My 2001 350 Mag Horizon in beeping 2 every few minutes when running, oil pressure is good, engine temp is good and gear lube reservoir is full? Seems like a bad sensor? Any help is appreciated.
 
D

dolemite_1

Seaman
Joined
May 7, 2008
Messages
71
Re: 350 MPI Horizon warning alarm beeping

I have the same engine and ran into the same issue last year. It is throwing a code and there are a lot of different things it could be. It drove me to buy that rinda computer diagnostic tool that hooks up to your engine to see what codes are active. It cost about $400-500 but helped me figure out what my problem was in 30 seconds and saved me the $200+ diagnostic fee a mechanic would have charged me to do the same thing.

With that being said; my issue was the sea water pressure sensor. At idle it was fine but when I would give it gas the sensor would go off. It is easy to get to and can be replaced in about 5 minutes. Hope this helps
 
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