Kia Optima: CVVT (Continuously Variable Valve Timing) System. Description 
		and Operation - Exhaust Emission Control 
		System - Emission Control System - Kia Optima TF 2011-2021 Service ManualKia Optima: CVVT (Continuously Variable Valve Timing) System. Description and Operation

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). ...

Description
Continuous Variable Valve Timing (CVVT) system advances or retards the valve timing of the intake and exhaust valve in accordance with the ECM control signal which is calculated by the engine sp ...

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Repair procedures
If the there is lack of power, excessive oil consumption or poor fuel economy, measure the compression pressure. 1. W ...

Inspection
With the power seat switch in each position, make sure that continuity exists between the terminals below. If continuity is not as specified, replace the power seat switch. A : Power seat control s ...

Front Fog Lamps Repair procedures
Inspection 1. Disconnect the negative(-) battery terminal. 2. Remove the lighting switch of the multi-function switch. (Refer to the multi-function switch) 3. With the front fog lamp switc ...

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