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DL9 - Check PFE/DPFE Sensor Pressure Input Hose(s)

- Remove each pressure input hose from Pressure Feedback EGR (PFE) / Differential Pressure Feedback EGR (DPFE) sensor.

- Inspect each hose and PFE/DPFE sensor inlet(s) for blockage.

- Is blockage present?

Yes -- Service as necessary. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

No -- Reconnect pressure input hose(s). Go to DL10. DL10 - Measure VREF Circuit Voltage at PFE/DPFE Sensor