CITROEN 2005 C4-XSARA-XSARA PICASSO BERLINGO Owner's Manual page 448

CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Interpretation of the diagnosis
E5AP2FCD
«x» Check satisfactory
«y» Lack of aircon fluid in the aircon circuit
«z» Excess aircon fluid in the aircon circuit
«aa» Filtering and drying cartridge clogged
«ab» Other problems (see table on previous page)
442