Ford F250 2002 Problems

Take it in as requested, even though you had the sensor replaced in 2006. It could be that Ford has an updated part that was developed since 2006 when they originally replaced yours. You don't know what part was used back then, it could simply have been another part of   the sort that fails. You should take advantage of the offer of a new sensor. But at the same time Ford has acknowledged that there is a problem with the sensor, which should put you in the box seat to have the cost of replacing the sensor back in 2006 reimbursed. I would   work through the dealer, and have him make a request of Ford for the money to be paid back.