Compression Ignition Addict
Join Date: May 2013
Location: Yeah Right
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There are 3 pyrometers and 1 high temp pressure sensor in the DPF. Spray some PB Blaster, WD 40, or other penetrating oil on the pressure sensor threads/bung. Try to get it off and do this:
1) Check the wiring and the connector plug for corrosion.
2) Examine the pressure sensor for soot and other debris.
Post a pick of the end of the pressure sensor if you do this. Also, if anyone else has the specs on the pressure sensor regarding millivolts vs pressure, you can check it with a multimeter to see if it's working. Also might check the resistance/ohms to see if it's within spec. I don't have those specs available. If you get the part number off the sensor, we can cross-reference it online and try to grab the specs. Typically they are +/- 5 volts.
Where are you located? I would be willing to let you try my pressure sensor if you live in/near Albuquerque.