Can you replace the dpfe sensor on a 2002 Taurus ses v6 from the top or do you have to install it from the bottom of the engine?

You can replace it from top, the dpfe sensor is located under the throttle at the drivers side of the engine and it hooks on two pipes and electric connector.

You have to remove the air cleaner, MAF sensor, throttle and the throttle sensor connector to get to it. It is hidden behind few hoses and connectors so you need too look real hard.

I hope this will help you out and good luck!