Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2018 Kia Optima EXFACTORY OEM SERVICE PROCEDURE
Repair Procedures: Adjustment
NOTE:
After replacing the VCMA (Variable Charge Motion Actuator) or intake manifold, be sure to delete the previous VCMA adaptive value by performing the "resetting adaptive values" procedure using KDS/GDS.
Information
VCMA learning procedure is performed automatically while driving but manual learning procedure is also available for immediate access to proper operation.
- Push the accelerator pedal at 2, 500 engine rpm for 2-3 seconds and then idle the engine.
- Repeat the no. 1 procedure three times.
- Switch "OFF" the ignition.
- Switch "OFF" the ignition.
- Connect the KDS/GDS to Data Link Connector (DLC).
- Switch "ON" the ignition.
- Select "Vehicle, Model year, Engine, System".
- Select "Vehicle S/W Management".
- Delete the previous VCMA adaptive value by selecting "Resetting Adaptive Values".
- Press [Reset] when ready.
- Reset completed.
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.