P0401 -- sensor issue
To start off, my mechanic ability is somewhat limited - as is my experience. On a 1996 Taurus Duratek - 6, after getting this code I researched and found quite a bit of advice re repair. I pulled the EGR and, although dirty, it did function when applying vacuum. The sensor was described as a "metal rectangle on the left rear of the manifold" but the vacuum tube from the EGR goes to a plastic sensor (? - at least it has two vacuum tubes [one leading to the vacuum plug on the manifold - described next] and wires) located on the top of the manifold -- right side. It has a round top that spins, but does not appear to remove - about 1 1/2 inch in diameter. I was able to find that the master vacuum plug had loosened (apparently due to steam cleaning) and I will be replacing (it is rubber with three holes on the bottom) but in the short term I used a plastic tie to test - still getting code. Is the plastic item bolted to the manifold the sensor that might need replacing? Where to the wires leading to the sensor come from and do I need to follow them to some location on the engine? Should I replace the EGR? Any help would be appreciated.