Sensor, Diesel Exhaust Fluid Quality: Description
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.
 Courtesy of CHRYSLER GROUP, LLC
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The Diesel Exhaust Fluid (DEF) Quality Sensor (1) is used to measure the quality of the DEF fluid. The DEF quality sensor is apart of the DEF tank and is NOT
a serviceable component. If diagnosis leads you to replace the DEF quality sensor, then you need replace the DEF tank.