Important to note: The vehicle or machine manufacturer is responsible to construct the wiring harness and allow the sensor to eventually connect to the ECM. The two pipes allow exhaust gas pressure from the inlet and outlet of the DPF respectively to reach the sensor. It is not easy to miss – there are two flexible pipes connected on the sensor body. The sensor is located on the Aftertreatment system, mounted directly on the DPF. The soot load of the Diesel Particulate Filter is monitored by the DPF differential pressure sensor. To protect the engine, the ECM activates the power derate. Cummins fault code 1922 becomes active when the soot load of the Diesel Particulate Filter (DPF) has exceeded the recommended limits.
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