So I have a P1400 code. EGR works and all passages in the plenum are clean. Testing the voltage on the DPFE gives me 4.95V on the reference incoming and 1.05V on he "measuring" side. After applying vacuum on the HI port side it drops from 1.05V to 0.13V. And then applying vacuum to the ref side it increases from 1.05V to 4.82V. Does this seem logical? Clogged orifice instead.?...