Kia Optima: Repair procedures - Crankcase Emission Control 
		System - Emission Control System - Kia Optima TF 2011-2026 Service ManualKia Optima: Repair procedures

Inspection

1. After disconnecting the vapor hose from the PCV valve, remove the PCV valve. Visually check for a collapsed vapor hose or hose leaks.
2. Reconnect the PCV valve to the vapor hose.
3. Run the engine at idle, then put a finger over the open end of the PCV valve and make sure that intake manifold vacuum can be felt.
The plunger inside the PCV valve will move back and forth at vacuum.

4. If the vacuum is not felt inspect PCV operation, if operating correctly clean or replace the vapor hose.

Schematic Diagrams
Schematic Diagram ...

Positive Crankcase Ventilation (PCV) Valve. Description and Operation
Operation Principle ...

See also:

Armed stage
Park the vehicle and stop the engine. Arm the system as described below. 1. Remove the ignition key from the ignition switch and exit the vehicle. 2. Make sure that all doors (and tailgate) and engi ...

Circuit Diagram (2)
...

ETC (Electronic Throttle Control) System. Troubleshooting
Fail-Safe Mode Item Fail-Safe ETC Motor Throttle valve stuck at 5° TPS TPS 1 fault ECM looks at TPS2 ...

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