2013 Suzuki DF300 Check Engine Code 4-4

Anyone have any experience with check engine code 4-4? I was fueling boat at dock, and spun it around under power--no issues. I started filling, but forgot to put fuel fill cap on before I started--thinking that code might be related to that. Cannot find 4-4 on any list of error codes on the internet, and dealer said to bring in so we could plug-in (easier said than done).

I will try to disconnect batteries to see if it will clear, and I will squeeze primer bulbs just to make sure properly pressurized.

Any info would be appreciated.

Thanks in advance