Volvo DPF Pressure

[RHeller11]

It doesnt ask for a regen very often. I last did a regen at the shop while hooked up to laptop 2 weeks ago. Mind you, this is with a brand new DPF filter and recently professionally cleaned DOC filter. I had t1 temps at 700, T2 temps at 920 and T3 temps at 928. DPF pressure started at .44 psi and ended at .17psi. my soot level was at 11% when done. Proceeded to drive approx. 200 miles and soot level was back to 100% where it would finally passive regen to about 85%. This has been that way for last 2 weeks. I checked the voltage from dpf sensor going to control module and I got .615 volts. I then unhooked the SCR inlet tube and got .61 volts at sensor. I think this is telling me my SCR is not causing a backpressure issue. however, I thought the output of the DPF sensor was .5 to 5 volts. if thats the case, the 100% soot level on dash is not matching up to what the dpf sensor is putting out.