Ducati XDIAVEL Owner's Manual page 137

Steering unlock error - Steering still locked
The activation of this "warning" indicates that the
Hands Free System was not able to disengage the
steering lock.
Warning
In this case, Ducati recommends switching
vehicle off and on again (Key-Off / Key-On), keeping
handlebar fully turned. If warning is still present (and
steering does not "unlock"), contact a Ducati
Authorised Service Centre.
136
Fig. 63