Hyundai service campaign 9C9
What it saysCertain Palisade (LX2) vehicles equipped with 3.8L GDI Lambda II engines may not meet engine-out NOx (Nitrogen Oxides) and Particulate Matter (PM) emission standards. NHTSA’s full summary ↓
Hyundai filed this with NHTSA as a service campaign dated Feb 21, 2026, received Feb 10, 2026, about the engine — 4 documents under this number: 9C9 OL, 26-01-010H DCS, 26-01-010H DN, 26-01-010H TSB. It names 6 model years (2020–2025). A service campaign is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationWhat it applies to, as the document itself states it — the build window in the manufacturer’s own words, read by machine from the PDF NHTSA serves. The build date is on the certification label in the driver’s door jamb; the dealer settles a borderline vehicle by its VIN.
Certain Palisade (LX2) vehicles equipped with 3.8L GDI Lambda II engines may not meet engine-out NOx (Nitrogen Oxides) and Particulate Matter (PM) emission standards. Technical Service Bulletin (TSB) 26-01-010H provides the service procedure to update the emission logic within the Engine Control Module (ECM) to improve engine-out NOx and PM emissions, so they are within permissible specifications. Additionally, improvements to reduce noise during engine start, and enhanced thermostat logic, are also included in the updated ECM software.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 9C9 OL | Service campaign | Feb 21, 2026 | 11028984 | PDF, 235 KB |
| 26-01-010H DCS | Service campaign | Feb 3, 2026 | 11028665 | PDF, 88 KB |
| 26-01-010H DN | Service campaign | Feb 3, 2026 | 11028664 | PDF, 415 KB |
| 26-01-010H TSB | Service campaign | Feb 3, 2026 | 11028663 | PDF, 733 KB |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 6 model years this bulletin names have filed 2,373 complaints with NHTSA since 2015. 259 of them name Engine — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
On the 2020 Hyundai Palisade, the 15 owners who gave an odometer reading for Engine reported it at a median of 25,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
The engie restarted itself after being shut off and no key was near vehicle and continued to run overnight, filing car with carbon monoxide. Hyundai service department was contacted and said no inspection was need but to monitor car and contact Hyundai customer line and advise. The reference case number is 20244323
2022 Hyundai Palisade · Engine · filed with NHTSA Aug 30, 2022 · ODI 11481948
On September 21, 2022 I had sat in my car for about 8 minutes idling with the key FOB in the car with me. I have as not on remote start. When I left the parking lot and drove a half a mile my engine shut off and a loud beep and red triangle warning came on that read engine failure and to start engine.
2023 Hyundai Palisade · Engine · filed with NHTSA Oct 7, 2022 · ODI 11488319
The contact owns a 2024 Hyundai Palisade The contact received notification of NHTSA Campaign Number: 24V106000 (Engine and Engine Cooling) however, the part to do the recall repair was not yet available. The local dealer was not contacted.
2024 Hyundai Palisade · Engine · filed with NHTSA May 20, 2024 · ODI 11589762
In depth: 2022 Hyundai Palisade engine problems → · 2021 Hyundai Palisade engine problems → · 2020 Hyundai Palisade engine problems →
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the engine
Source: same model, same component group10 other manufacturer communications filed against the Hyundai Palisade under the same component group (engine), newest first. The eight newest are listed; the rest are on the Hyundai list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 26-EM-017H | Service bulletin | Oct 8, 2026 | Certain Palisade (LX2) and Santa Fe (NC) vehicles equipped with Lambda II 6-cylinder engines may exhibit higher-than-expected engine oil con… |
| 26-EM-015H | Service bulletin | Oct 7, 2026 | Certain vehicles equipped with internal combustion engines may exhibit higher-than-expected engine oil consumption. This bulletin provides t… |
| LA13 | Warranty extension | Aug 11, 2026 | Certain Palisade (LX3) and Palisade Hybrid (LX3 HEV) vehicles may exhibit a “Check Active Air Flap System" warning message, Engine MIL ON, a… |
| 9D6 | Service campaign | Aug 6, 2026 | Certain Palisade (LX3) vehicles may exhibit an engine misfire condition which may result in one or more of the DTCs listed below. This updat… |
| Z15 | Warranty extension | Aug 3, 2026 | Some Palisade (LX2) vehicles may exhibit engine oil leakage at the engine oil filter housing assembly due to deterioration of the housing se… |
| 26-EC-001H | Service bulletin | Jul 30, 2026 | Some Palisade Hybrid (LX3 HEV) vehicles may exhibit continuous engine operation due to the vehicle being unable to enter EV/HEV modes. The v… |
| LA16 | Service campaign | Feb 24, 2026 | Certain Palisade Hybrid (LX3 HEV) vehicles equipped with the 2.5T-GDI HEV engine may set DTC P050500/P050600. Technical Service Bulletin… |
| 9C8 & 9C9 | Service campaign | Feb 21, 2026 | Hyundai Motor America wants you to be aware of two Important Service Campaigns related to your Hyundai vehicle. Enclosed are the notificatio… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Hyundai, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Hyundai 9C9 a recall?
No. A service campaign is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the 9C9 repair free?
A service campaign is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does 9C9 cover?
The manufacturer filed it against 6 model years: 2025 Hyundai Palisade, 2024 Hyundai Palisade, 2023 Hyundai Palisade, 2022 Hyundai Palisade, 2021 Hyundai Palisade, 2020 Hyundai Palisade. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone. The document itself sets the build window: built 10 Apr 2019 – 16 Jun 2025 — the build date is on the certification label in the driver’s door jamb.