TSB 9C2 — Hyundai Service campaign
9C2 is a service campaign on file with NHTSA for 3 Hyundai models, 2015–2021 model years, filed and re-filed as 3 documents. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. Certain 2019 – 2020 model year Santa Fe, 2017 – 2018 model year Santa Fe Sport, 2015 – 2019 model year Sonata, and 2018 – 2021 model year Tucson vehicles may exhibit elevated engine-out emissions. Hyundai is conducting a service campaign to update the Engine Control Module (ECM)…
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Worth checking your VIN against. 9C2 is filed as a service campaign, which unlike an ordinary bulletin can mean free or reimbursed work when a vehicle qualifies. Ask a dealer using the document ID below, and check open recalls separately at nhtsa.gov/recalls.
Vehicles and model years 9C2 names
| Vehicle | Model years |
|---|---|
| Hyundai Santa Fe | 2017, 2018, 2019, 2020 |
| Hyundai Sonata | 2015, 2016, 2017, 2018, 2019 |
| Hyundai Tucson | 2018, 2019, 2020, 2021 |
Every document filed under 9C2
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 |
|---|---|---|
| 9C2 OL | April 14, 2026 | Service campaign |
| 9C2 Susp DN | March 30, 2026 | Service campaign |
| 9C2 Susp DCS | March 30, 2026 | Service campaign |
What 9C2 covers
Engine — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB 9C2?
9C2 is a service campaign filed with NHTSA by Hyundai, covering 3 Hyundai models across the 2015–2021 model years. NHTSA's summary reads: Certain 2019 – 2020 model year Santa Fe, 2017 – 2018 model year Santa Fe Sport, 2015 – 2019 model year Sonata, and 2018 – 2021 model year Tucson vehicles may exhibit elevated engine-out emissions. Hyundai is conducting a service campaign to update the Engine Control Module (ECM)…
Which vehicles does 9C2 cover?
NHTSA's file names Hyundai Santa Fe (2017–2020); Hyundai Sonata (2015–2019); Hyundai Tucson (2018–2021). 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 9C2 a recall, and is the repair free?
9C2 is filed as a service campaign, not a recall — but this is the kind of communication that can mean free or reimbursed work if your VIN qualifies. Take the number to a dealer and ask. Recalls are separate and always free; check yours by VIN at nhtsa.gov/recalls.
How do I get the full text of 9C2?
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 9C2, 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 9C2. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.