When Monitored

WARNING: This page is about a different car, the 2016 RAM 3500 HD and 2016 RAM 2500 HD. 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 three minutes.
Engine speed between 1400 and 2300 rpm.
ECT above 70°C (158°F).
Vehicle speed between 64 and 96 km/h (40 and 60 mph).