DTC P1405: Differential Pressure Feedback (DPF) Sensor Upstream Hose Off Or Plugged
P1405 - DIFFERENTIAL PRESSURE FEEDBACK (DPF) SENSOR UPSTREAM HOSE OFF OR PLUGGED
| Description: | While driving, the exhaust gas recirculation (EGR) monitor commands the EGR valve closed and checks the differential pressure across the EGR orifice. The test fails when the signal from the DPF EGR sensor indicates EGR flow is in the negative direction. | ||
| Possible Causes: |
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| Diagnostic Aids: | Look for signs of water or icing in the hose. Verify the hose connection and routing (no excessive dips). Verify the DPF EGR sensor for correct mounting and function. View the DPF EGR PID while applying and releasing vacuum directly to the sensor with a hand pump. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | - | GO to Pinpoint Test HE . | GO to Pinpoint Test HE . |