Kia Optima 2016–2020 — technical service bulletin
Bulletin SC340_OWNR_JF&JFA_104 · NHTSA communication 11030390 · issued Mar 17, 2026
Technical service bulletin
communication type
Electrical System
component
2016–2020
model years
5
vehicle entries
Official summary
VOLUNTARY EMISSIONS SERVICE CAMPAIGN: OWNER NOTIFICATION (SC340 FLIGHT 104 ) - This document is the owner notification advising that Kia is conducting a Voluntary Emissions Service Campaign to improve the emissions software logic in the Electronic Control Module (ECM) for certain 2016-2020 MY Optima vehicles equipped with 2.4L Gas Direct Injection (GDI) engines to ensure compliance with emissions regulations.
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.