CITROËN C3 PICASSO Handbook page 110

Safety
Snow chains
The system does not have to be
reinitialised after fitting or removing
snow chains.
The under-inflation alert is only
dependable if the system has been
reinitialised with all four tyres inflated to
the correct pressures.
112
Operating fault
The flashing and then fixed illumination of the
under-inflation warning lamp accompanied
by illumination of the Service warning lamp
indicates a fault with the system.
In this case, under-inflation monitoring of the
tyres is no longer assured.
Have the system checked by a CITRoËn
dealer or a qualified workshop.
before doing anything to the system,
the pressures of the four tyres must be
checked and the system reinitialised.