Exhaust Pressure Differential Sensor: Description and Operation
ENGINE CONTROL COMPONENTSDiesel Particulate Filter Pressure Sensor
The diesel particulate filter pressure sensor is an input to the PCM and measures the pressure before the diesel particulate filter. The sensor is a differential-type sensor that is referenced to atmospheric pressure and is located at the exhaust system downstream of the diesel particulate filter. At key ON, engine OFF the diesel particulate filter pressure sensor pressure value reads 0 kPa (0 psi). The range of the sensor is 0-80 kPa (0-11.6 psi). The PCM calculates soot load based on the diesel particulate filter pressure and initiates a regeneration when the soot load reaches a threshold.
