Fiat Punto Owner's Handbook Manual page 46

Warning light
21) To prevent damaging the engine, it is advisable to change the engine oil when the warning light flashes. Contact a Fiat Dealership.
44
Degraded engine oil (MultiJet versions with DPF)
The warning light comes on and flashes (on some versions along with a message on the display). Depending on
the versions, the warning light can flash: for 1 minute every 2 hours or for 3 minute cycles with the warning light off
for 5 seconds until the oil is changed. After the initial warning, each time the engine is started up, the warning light
will continue to flash in the same mode, until the oil is changed. On some versions, a message is shown on the
display.
The flashing of the warning light should not be considered as a fault, it simply informs the customer that the oil
needs to be changed following normal car use. On some versions, if the oil is not changed, when a second
degradation threshold is reached, the
to 3000 rpm operation. If the oil is still not changed, when a third deterioration threshold is reached, the engine is
limited to 1500 rpm to prevent damage.
Engine oil deterioration is accelerated by:
use of the vehicle mainly in town, which makes the DPF regeneration process more frequent;
use of the vehicle for short drives, in which the engine does not have time to reach its regular operating
temperature;
repeated interruptions to the regeneration process signalled by the DPF warning light coming on.
21)
What it means
instrument panel warning light also comes on and the engine is limited
WARNING