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Re: 2001 Windstar Engine Light On
Usually yhe P0401 is the DPFE sensor. That is the sensor that tells the computer what position the EGR is in or needs to be in for proper operation. You can go to a parts house that sells Motorcraft parts and have them let you look at one and you will see it on the engine. Also anoyher common problem is the passages in the intake under the EGR clogging with carbon. Good luck.
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