Overdrive (O/D) OFF (Gasoline Engine Vehicles)
WARNING: This page is about a different car, the 2008 Ford Pickup, 2008 Ford F550 Super Duty, 2008 Ford F450 Super Duty, and 2008 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The Overdrive (O/D) OFF Transmission Control Switch (TCS) is a momentary contact switch located on the end of the selector lever which is used along with the O/D OFF indicator lamp. When pressed, the O/D OFF switch sends a signal to the PCM to only allow automatic upshifts that include 5th gear. O/D or 6th gear, is disabled during O/D OFF mode. Pressing the O/D OFF button again restores automatic upshifts from 1st through 6th gears.