Sensor, Particulate Matter: 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 Particulate Matter (PM) sensor (1) is located in the rear of the Selective Catalyst Reduction (SCR). The function of the PM sensor is to detect the efficiency in the Diesel Particulate Filter (DPF).
 Courtesy of CHRYSLER GROUP, LLC
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The PM sensor module (3) is only serviceable with the PM sensor.