Fiat 500 Owner's Handbook Manual page 52

42) If the
warning light switches on when driving (on certain versions together with a dedicated message on the display) stop the engine
immediately and contact a Fiat Dealership.
Warning light
red
red
50
WARNING
What it means
ENGINE COOLANT TEMPERATURE TOO HIGH
The warning light switches on when the ignition key is turned to MAR, but it should switch off after a few
seconds.
The warning light or symbol on the display lights up when the engine is overheated, on some versions,
together with a dedicated message on the display.
In normal driving conditions: stop the car, switch off the engine and check that the fluid level in the
reservoir is not below the MIN mark. In this case, wait for the engine to cool down, then slowly and
carefully open the cap, top up with coolant and check that the level is between the MIN and MAX marks on
the reservoir itself. Also check visually for any fluid leaks. If, when restarting, the warning light switches on
again, contact a Fiat Dealership;
If the car is used under demanding conditions (e.g. towing trailers uphill or fully loaded): slow
down and, if the warning light stays on, stop the car. Stop for two or three minutes with the engine running
and slightly accelerated to facilitate better coolant circulation, then turn the engine off. Check that the
coolant level is correct as described above.
IMPORTANT Over demanding routes, it is advisable to keep the engine running and slightly accelerated for
a few minutes before turning it off.
On certain versions a dedicated message is displayed.
"DUALOGIC" GEARBOX FAILURE
When the ignition key is turned to MAR, the warning light switches on but should switch off after a few
seconds.
The warning light comes on flashing, along with a dedicated message on the display and an acoustic
warning, to indicate transmission failure.
31)