GEAR in Drive Mode

WARNING: This page is about a different car, the 2009 Mercury Milan and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

Drive Mode for GEAR operates only when:

Output Shaft Speed (OSS) and Transmission Range (TR) sensor are operational.
No OSS and TR sensor DTCs set.
Engine ON.
Torque Converter Clutch (TCC) is OFF (TCC cannot be engaged).
Selector lever is in D.
Vehicle speed is above 3 km/h (2 MPH).