Multiecuscan

Hello everyone. I've got a no start no crank situation. Fiat Ducato 2008 3.0 ltr motorhome. Stuck on campsite for months now. Had RAC out a fortnight ago and even they didn't have a scooby doo. Not sure what to do next so bought the ecumultiscan. Got the P0817 fault code but really not sure what this means other than I've got a sensor problem. Gearbox is automatic. I have had water in the fuse box so replaced that but not sure if maybe the ecu has been damaged also. Any advice please ? Thanks

I have for P0187

P0817=Circuito disabilitazione motorino avviamento

P0817=Starter motor disable circuit

This code is not generally listed from most available sources, even in many Fiat listings so took a little finding.

Hope the info helps.