CITROËN C3 PICASSO 2012 Owner's Handbook Manual page 28

Monitoring
Deactivation indicator lamps
If one of the following indicator lamps comes on, this confirms that the corresponding system has been switched off intentionally.
This is may be accompanied by an audible signal and a message on the multifunction screen.
Warning lamp
Passenger's
airbag system
ESP/ASR
26
is on
fixed. The control switch, located at the
driver's end of the dashboard, is set
to the "OFF" position.
The passenger's front airbag is
deactivated.
In this case you can install a "rear
facing" child seat.
fixed. The button, located in the middle
of the dashboard, is pressed. Its
indicator lamp is on.
The ESP/ASR is deactivated.
ESP: electronic stability programme.
ASR: anti-skid regulation.
Cause
Set the control switch to the "ON" position to activate
the passenger's front airbag. In this case, do not fit a
child seat in the rear-facing position.
Press the button to activate the ESP/ASR. Its indicator
lamp switches off.
The ESP/ASR system is activated automatically when
the vehicle is started.
If deactivated, the system is reactivated automatically
from approximately 30 mph (50 km/h).
Action / Observations