The activation of this (amber yellow) "warning" indicates that the status of the battery vehicle is low.
It is activated when the battery voltage is ¼ 11.0 Volt.
Note
In this case, ducati recommends charging the battery as soon as possible with the specific device, as it is possible that the vehicle will not start.

Warning indication (alarms/signals)
Traction control (dtc) deactivatedIntroduction to the engine control system
The engine control system used on the diavel consists of the following
elements:
Ride-by-wire system (motorised throttle valves with electric actuator,
throttle grip position sensor and throttle valve
position sensor)
One injector per cylinder installed downstream of throttle valve
On ...
Inspection of the gear selector drum
Use a gauge to measure the clearance between fork pin and the slot on the
selector drum.
If the service limit is exceeded, determine which part must be replaced by
comparing these dimensions with those of new
components (sect. 3 - 1.1, Gearbox).
Also check the wear on the drum support pin ...
Coolant expansion tank
Plug
Screw
Fuel filler flange
Clip nut
Clamp
Hose clip
Valve/tank hose
Clamp
Screw
Spacer
Rubber mounting
Expansion reservoir
Filler cap
Hose clip
Support
Screw
Washer
Screw
Hose clip
Breather hose
Clamp
Pump/radiator sleeve
Radiator/radiator sleeve ...