Alfa Romeo Giulia Owner's Handbook Manual page 65

Symbol
WATER IN DIESEL FILTER (Diesel versions)
The symbol switches on constantly when driving, along to indicate the presence of water in the diesel filter.
DPF CLEANING (particulate trap) in progress (diesel versions with DPF only)
The symbol comes on when the ignition device is brought to ON, but it should switch off after a few seconds.
The symbol switches on constantly to indicate that the DPF system needs to eliminate the trapped pollutants (particulate)
through the regeneration process.
The symbol does not switch on during every DPF regeneration, but only when driving conditions require that the driver is notified.
To turn off the symbol, keep the vehicle in motion until the regeneration process is over. On average, the process lasts
15 minutes. Optimal conditions for completing the process are achieved by travelling at 37 mph (60 km/h) with engine speed
above 2000 rpm.
When this symbol switches on, it does not indicate a fault and thus it should not be taken to a workshop.
20) The presence of water in the fuel system circuit may cause severe damage to the injection system and irregular engine operation. If the
symbol is displayed contact an Alfa Romeo Dealership as soon as possible to bleed the system. If the above indications come on immediately
after refuelling, water has probably been introduced into the tank: stop the engine immediately and contact an Alfa Romeo Dealership.
What it means
IMPORTANT
20)
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