Kia Optima: Automatic Transaxle OperationThe optional automatic transaxle is electronically controlled.

All normal forward driving is done with the shift lever in the D (Drive) position.
To move the shift lever from the P (Park) position, the ignition switch must be in the ON position, the brake pedal must be depressed and the lock release button must be depressed.
For smooth operation, depress the brake pedal when shifting from N (Neutral) to a forward or reverse gear.
WARNING - Automatic Transaxle
Before leaving the driver’s seat, always make sure the shift lever is in the P (PARK) position; then set the parking brake fully and shut the engine off. Unexpected and sudden vehicle movement can occur if these precautions are not followed in the order identified.
✽ NOTICE
Transaxle RangesFront Door Edge Warning Light
A red light comes on when the front door is opened. The purpose of this light
is to assist when you get in or out and also to warn passing vehicles. ...
Engine Coolant Temperature Sensor (ECTS). Specifications
Specification
Temperature
Resistance (kΩ)
°C
°F
-40
-40
48.14
-20
-4
...
SS-A Solenoid Valve(ON/OFF). Schematic Diagrams
Circuit Diagram
...