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November 5, 2025 Service bulletin

Voluntary emissions service campaign: theta II 2.4L GDI emissions ECM logic improvement (SC340)

Kia technical service bulletin SC340_TSB for 2016-2020 Kia Sorento, 2016-2020 Kia Optima and 2016-2022 Kia Sportage.

Bulletin number
SC340_TSB (SC340)
Component
Engine
Summary
TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340) - This bulletin provides information to upgrade the Electronic Control Module ‘ECM’ system software for certain 2016-2022MY vehicles equipped with 2.4L Theta II engines listed in the table below. Kia has become aware that certain 2016-2022MY vehicles equipped with 2.4L Theta II engines may have engine calibrations that were not optimized for emissions standards under certain specific conditions. These calibrations may cause the vehicle to release air pollutants which exceed Federal and California standards. These standards were established to protect your health and welfare from the dangers of air pollution.

Owners of these vehicles have filed 3,015 complaints in the engine category.

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