go buy a new DPFE sensor.......then install it....it's prolly located on the right side of the motor back near the firewall.......it's about 5 inches to the right of the block......it has two hoses comming up to it and a plug in the front of it......just pull the hoses and unplug it and re install the new one.....it's very easy.....then take the battery off for a while so the computer resets then put battery back on and the light should be gone......and questions send a message
i got mine from a buddy that works at a ford dealer for 16 bucks.....their cheap so just replace it