When Monitored

WARNING: This page is about a different car, the 2016 Dodge Journey and 2015 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.

There are several different catalyst efficiency monitoring windows. Each specific window has several different enable conditions. The best opportunity for the catalyst efficiency monitor to run is:

With the Engine warmed up above 60°C (140°F)
Engine speed between approximately 1000 rpm and 2500 rpm
Vehicle speed between 3 mph and 80 mph
Under moderate engine load
No other O2 Sensor circuit faults active