See also:

Onboard Diagnostic System — OBD II
Your vehicle is equipped with a sophisticated onboard diagnostic system called OBD II. This system monitors the performance of the emissions, engine, and automatic transmission control systems. ...

Overdrive Operation
The automatic transmission includes an electronically controlled Overdrive (fourth gear). The transmission will automatically shift into the Overdrive gear if the following conditions are presen ...

From Three V-6 Engines to One
Last year, Town & Country shoppers had a choice of three V-6 engines, but for 2011 all models are powered by a 283-horsepower, 3.6-liter V-6 that teams with a six-speed automatic transmission. ...