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Overvoltage Code SPN29 FMI3 PPS2

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My buddy has a 2011 Sunscape with the monsoon 350. We are getting a warning horn and active fault with the following code SPN29 FMI3 PPS2

the diagnostic page says it is “VOLTAGE ABOVE NORMAL OR SHORTENED HIGH”. We can idle just fine but boat will not go above 24 mph and 3000rpm. Voltage gauge at idle shows 14.5

Any thoughts?  

I have an ‘06 Sunscape with the 320. Hopefully when I launch mine tomorrow I won’t have any glitches 😬

Many thanks. 



Edited by LarsJensen
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after troubleshooting, we decided to switch from battery 2 to battery 1 and now everything works. Boat started just fine on Battery 2. It’s a Blue Seas battery switch. Not sure if bad switch or battery as Blue Seas has rave reviews. 

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