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:

With the engine running.
No O2 Sensor Heater DTCs present.
Battery voltage greater than 10.4 volts.
Oxygen Sensor 2/2 heater temperature within a specific range.