P1405: DPF EGR Sensor Upstream Hose Off or Plugged"

Our car threw code P1405 last night: "DPF EGR Sensor Upstream Hose Off or Plugged".

• DPFE represents an initialism for "Differential Pressure Feedback of EGR." 
• EGR represents an initialism for "Exhaust Gas Recirculation."
• EVR represents an initialism for "Electronic Vacuum Regulator"
• Possibilities:
• "Most than likely the port behind the intake manifold is clogged" (via)
• Although, "Usually plugged supply hoses generate P0401 codes" (via)
• Upstream hose for DPFA sensor had just popped off (via)
• All hoses seem connected OK
• The mounting bolts for the DPFE seem to have sheared off, though, which might cause the tubes to compress?
• So, need to replace the foam and bolts for the DPFE sensor
• May as well pull the EVR and EGR valve at the same time
• Check the port behind the intake manifold as well when replacing
• Went to a local auto junkyard and pulled a DPFE sensor and an EVR.
• Tried to remove the mounting but could not get enough torque to remove the final 10mm nut...a 10mm deep socket might have worked

At home, installed the salvaged DPFE sensor and EVR. Re-attached the battery cable. So far, no check engine light...which may indicate a bad EVR? Or I just have not driven it enough, yet.

I succeeded only in taking the broken bolts out of the DPFE mounting...I could not remove the DPFE bolts from the DPFE sensor itself. So I ended up using the salvaged DPFE sensor.

Got everything back together again.

Also:

• Installed salvaged windshield wiper fluid reservoir cap 
• Installed salvaged battery cable clamps and positive battery cover
• Installed salvaged steering wheel plastic bolt cover
• Installed new blower motor resistor
• Found a leaf on the resistor, which might explain why it had problems?
• Installed a new blower motor connector 
• Snipped old connetor off
• Stripped wires and re-soldered wires onto salvaged connector
• Taped with electrical tape
• Accidentally dropped the old positive battery cable clamp down into the area near the driver-side wheel well...oh well x_x
• Cleaned the rear hatch area above and around the weatherstripping of dirt and debris
• Cleaned the engine compartment area near the windshield of dirt and debris
• Washed and cleaned the front, driver-side, and passenger windows
• Messed around a bit with the HVAC control arms which operate the baffles within the heater box