Kia Optima: Valve Body. Description and OperationDescription
The valve body is essential to automatic transaxle control and consists of various valves used to control the oil feed from the oil pump. Specifically, these valves consist of pressure regulator valves, oil redirection valves, shift valves, and manual valves. The body also features electronic solenoid valves that ensure smooth gear changes.

Replacement
Valve Body. Components and Components LocationRemote Fuel Filler Lid Release
Depress on the release button located on the driver’s door to open the fuel filler
lid.
WARNING
To avoid injury from sharp objects, it is recommended that protective gloves
be worn when ...
Engine Temperature Gauge
This gauge shows the temperature of the engine coolant when the ignition switch
is ON.
If the gauge pointer moves beyond the normal range area toward the H position,
it indicates overheating that ...
Catalytic Converter. Description and Operation
Description
The catalytic converter of the gasoline engine is a three
way catalyst. It oxidizes carbon monoxide and hydrocarbons (HC), and separates
oxygen from the oxides of nitrogen (NOx).
...