Fiat 500L Owner's Handbook Manual page 56

Warning light
30) Go to a Fiat Dealership as soon as possible if the warning light either does not light up when the key is turned to MAR or lights up or
flashes (along with a message and a symbol on the display on some versions). The exhaust emission levels may be checked by the traffic
control authorities using the appropriate equipment. Always comply with the traffic regulations in force in the country where you are driving.
54
INJECTION/EOBD SYSTEM FAILURE
If the warning light remains on or switches on whilst driving (on some versions together with the display of a
message and a symbol), the injection system is not working properly.
Warning light on constantly: signals a malfunction in the supply/ignition system that could cause high
exhaust emissions, a possible loss of performance, poor driveability and high consumption. Under these
conditions, the vehicle can continue travelling at moderate speed but without demanding excessive effort
from the engine or high speed. Prolonged use of the vehicle with the warning light on constantly may cause
damage: contact a Fiat Dealership as soon as possible.
The warning light switches off if the malfunction disappears, but is still stored by the system.
Warning light on and flashing (for petrol engines only): it reports a possible damage to the catalytic
converter. Release the accelerator pedal to lower the speed of the engine until the warning light stops
flashing. Continue the journey at moderate speed, trying to avoid driving conditions that may cause further
flashing and contact a Fiat Dealership as soon as possible.
WARNING
What it means
30)