98 windstar 3.0

have 98 windstar 3 liter v6. am getting a code set that scanner says excessive egr flow. voltages test out good on the flow sensor.can turn
check engine light off and it comes back on after about 4 hours of driving. any ideas would be appreciated. lucas
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.