2016-2022 Kia Emissions Software Update SC340

Why this matters

Kia has identified that certain vehicles may have been manufactured with engine calibrations that cause them to release air pollutants exceeding Federal and California standards. These standards are crucial for protecting public health and welfare from the dangers of air pollution. This campaign aims to bring affected vehicles into compliance with these important environmental regulations.

What's being addressed

This Voluntary Emissions Service Campaign (SC340) focuses on improving the emissions software logic within the Electronic Control Module (ECM). The campaign targets specific vehicles equipped with 2.4L Theta GDI engines, including certain 2017-2022 MY Sportage, 2016-2020 MY Optima, and 2016-2020 MY Sorento models. The goal is to ensure these vehicles meet all applicable emissions regulations, specifically through an update to the Kia Sportage emissions software and that of the other affected models.

Symptoms

Owners may not experience any direct driving symptoms or warning lights related to this issue. The core problem is that the vehicle's engine calibrations could lead to the release of air pollutants that exceed regulatory limits, rather than a noticeable operational fault. The Kia Sportage emissions software update addresses this underlying non-compliance, which is not typically perceptible to the driver.

Fault codes / DTCs

The campaign involves updating the ECM software with improved Diagnostic Trouble Code (DTC) judgment logic. While the document mentions this improvement, it does not specify any particular DTCs that might be triggered by the original emissions non-compliance. The update aims to enhance the system's ability to correctly identify and manage emissions-related conditions, rather than addressing a specific existing fault code.

Repair procedure summary

Authorized Kia dealerships will perform a software update to the Electronic Control Module (ECM). This process typically involves connecting the vehicle to a diagnostic system to flash the ECM with the new calibration. The updated software will include improved emissions logic and enhanced Diagnostic Trouble Code (DTC) judgment logic, ensuring the vehicle operates within Federal and California emissions standards. This essential update for the Kia Sportage emissions software will be completed at no cost to the customer.

Owner action

Kia will begin notifying affected vehicle owners by mail between October 28, 2025, and December 2025. Upon receiving notification, owners should contact their authorized Kia dealer to schedule an appointment for the ECM software update. This service is provided free of charge. Completing this update is crucial for ensuring your vehicle complies with environmental regulations. Owners in California and other specific states should pay close attention to the 'Proof of Correction Card' details mentioned below, as it may be required for vehicle registration renewal.

Important warnings

For owners in California, the state has implemented a 'Registration Renew / Tie-In Program' that mandates the completion of emissions campaigns before vehicle registration renewal. Dealers are required to provide a completed "Proof of Correction Card" to each owner upon completion of the campaign. This card serves as proof for registration renewal. Similarly, for owners in Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, and Washington, a "Proof of Correction Card" must be provided to the owner for use, if requested, at vehicle registration renewal. It is important to retain this card if you reside in one of these states and plan to renew your vehicle's registration.

Source: NHTSA document SC340.