The activation of this (amber yellow) "warning" indicates that the hands free system has detected that the battery that permits the active key (1, fig. 62) To communicate and turn the vehicle on is almost discharged.
Note
In this case, ducati recommends replacing the battery as soon as possible as described in the paragraph "replacing the active key battery" (page 88).

Hands free key (hf) not recognised
High engine coolant temperatureBattery voltage indicator (battery)
This function describes the battery voltage indicator.
To access the function it is necessary to view the "setting" menu page 48, using
button (1, fig. 14) ?"" or (2, fig.
14) ?" " select the "battery" function
and press the reset
button (12, fig. 12 ...
Removing the valve rocker arms
With the cylinder head in the condition described in the previous paragraph,
remove the rocker arms.
Unscrew the eight plugs (12) and recover the seals (15).
Using an m6 screw, withdraw the shafts (2) of the opening rocker arms (3) on
the exhaust and intake sides.
Remove the openi ...
Immobilizer override procedure
This procedure makes it possible to "temporarily" turn on the motorcycle if
the hf (hands free) system is not working.
Note
The pin code function must be activated by entering your 4 digit pin in
the dashboard, otherwise the vehicle cannot be
turned on temporarily in the case of a malfunction ...