Set Condition
WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The DEF Quality Sensor detects a short to ground/low voltage condition on the internal temperature sensor for 5 seconds or the temperature at the DEF Quality Sensor temperature sensing element is less than -40°C (-40°F) for 5 seconds.