You need to replace your DPFE (Delta or Differential Pressure Feedback E.G.R.) sensor. It helps regulate the amount of E.G.R. flow that is needed. It is located on the intake manifold and has two rubber hoses attached to it. It is screwed on with two 7mm screws. It is black on the 2001 taurus and is about 2 1/2" by 1.5" rectangular shape. If the engine light is still on then disconnect your battery after you change the sensor. Leave it disconnected for about 1/2 hr. This will clear the engine light for you.
