TSB SC340 — Kia Emissions communication
SC340 is an emissions communication on file with NHTSA for 3 Kia models, 2016–2022 model years, filed and re-filed as 20 documents. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: OWNER NOTIFICATION (SC340 FLIGHT 105) - 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…
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years SC340 names
| Vehicle | Model years |
|---|---|
| Kia Optima | 2016, 2017, 2018, 2019, 2020 |
| Kia Sorento | 2016, 2017, 2018, 2019, 2020 |
| Kia Sportage | 2016, 2017, 2018, 2019, 2020, 2021, 2022 |
Every document filed under SC340
Manufacturers re-issue a bulletin as the repair changes, and file separate copies for technicians and for owners. All of them carry the same number.
| Document ID | Filed | Type |
|---|---|---|
| SC340_TSB_R5 | April 4, 2026 | Emissions communication |
| SC340_OWNR_JF&JFA_104 | March 17, 2026 | Emissions communication |
| SC340_OWNR_NQ5_105 | March 17, 2026 | Emissions communication |
| SC340_TSB_R4 | March 6, 2026 | Emissions communication |
| SC340_OWNR_UM103 | December 19, 2025 | Emissions communication |
| SC340_OWNR_JF103 | December 19, 2025 | Emissions communication |
| SC340_OWNR_QL103 | December 19, 2025 | Emissions communication |
| SC340_TSB_R3 | December 10, 2025 | Service bulletin |
| SC340_OWNR_UM101 | November 27, 2025 | Emissions communication |
| SC340_OWNR_JF101 | November 27, 2025 | Emissions communication |
| SC340_OWNR_QL101 | November 27, 2025 | Emissions communication |
| SC340_TSB_R2 | November 21, 2025 | Service bulletin |
| SC340_TSB_R1 | November 7, 2025 | Service bulletin |
| SC340_OWNR_JF102 | November 7, 2025 | Emissions communication |
| SC340_TSB | November 5, 2025 | Service bulletin |
| SC340_DP | October 23, 2025 | Emissions communication |
| SC340_DPSM | October 23, 2025 | Emissions communication |
| SC340_POC | October 23, 2025 | Emissions communication |
| SC340_QA | October 23, 2025 | Emissions communication |
| SC340_STKR | October 23, 2025 | Emissions communication |
What SC340 covers
Engine, Electrical — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB SC340?
SC340 is an emissions communication filed with NHTSA by Kia, covering 3 Kia models across the 2016–2022 model years. NHTSA's summary reads: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: OWNER NOTIFICATION (SC340 FLIGHT 105) - 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…
Which vehicles does SC340 cover?
NHTSA's file names Kia Optima (2016–2020); Kia Sorento (2016–2020); Kia Sportage (2016–2022). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB SC340 a recall, and is the repair free?
No. SC340 is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.
How do I get the full text of SC340?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under SC340, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under SC340. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.