When Monitored

WARNING: This page is about a different car, the 2015 Fiat 500. However, it is still accessible from the selected car via links, so may be relevant.

This diagnostic runs continuously when the following conditions are met:

Engine run time greater than one minute.
Engine speed above 2016 RPM.
Engine coolant temperature above 65°C (149°F).
Upstream O2 Sensor in closed loop operation.
Vehicle speed above 88.5 km/h (55 mph).
Catalyst temperature between 600°C and 800°C (1112°F and 1472°F).