Sensor, Particulate Matter: Description: Description
WARNING: This page is about a different car, the 2015 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
The Particulate Matter (PM) sensor (1) is located in the center of the Selective Catalyst Reduction (SCR). The function of the PM sensor is to detect the efficiency in the SCR.
The PM sensor module (4) is only serviceable with the PM sensor, DO NOT try to disconnect wire harness connector (3) from module.