Ducato electrical malfunctions

That sounds remarkably similar to a problem I had with my Ducato. Though, the simultaneous electrical gremlins and nav system failure are particularly concerning. Before diving too deep, could you clarify which error code is being stored? It might help narrow down the root cause. Also, have you checked the battery voltage lately? Sometimes a weak battery can cause all sorts of spurious errors in modern vehicles with complex electronics.

Thanks for the quick reply! The error code is U01400, lost communication with body control module. The battery seems fine, showing a steady 12.6V at rest. I suspect it's really the control unit programming. Have you had this specific error code?

Ah, the U01400 error code, yes, that rings a bell! In my case, the issue turned out to be precisely what your diagnostic tool suggests: a corrupted control unit program. I attempted a few DIY fixes based on online forums, but ultimately, I ended up having to take it to a qualified workshop. They performed a recalibration of the control unit, which resolved the problem entirely. Based on your symptoms and the error code, I would strongly advise against attempting any advanced software manipulations yourself, as you could potentially brick the entire system. Instead, consider scheduling an appointment with a reputable workshop that specializes in Fiat vehicles and has experience with software updates and recalibrations.

Appreciate the advice. I was hoping to avoid the workshop, but it seems like the best course of action. I'll book it in and let them recalibrate the control unit. Thanks again for your help!