Hyundai bulletin 24-FL-003H
What it saysThis bulletin contains the software update procedure for the Engine Control Unit (ECU) on certain 2021-2023MY Elantra (CN7) and 2022-2023MY Kona (OS) vehicles equipped with the 1.6 liter T-GDI Gamma 2 engine… NHTSA’s full summary ↓
Hyundai filed this with NHTSA as a service bulletin dated Mar 4, 2024, received Apr 2, 2024, about the engine. It names 5 model years (2021–2023). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis bulletin contains the software update procedure for the Engine Control Unit (ECU) on certain 2021-2023MY Elantra (CN7) and 2022-2023MY Kona (OS) vehicles equipped with the 1.6 liter T-GDI Gamma 2 engine, that may exhibit a warning lamp with one or more of the DTCs listed below: ⢠P250F - Engine Oil Level Too Low ⢠P011B, P050C - Engine Coolant Temperature/intake Air Temperature Correlation ⢠P00B7, P2B60 - Engine Coolant Flow Low/Performance
Trouble codes it names: P011B P050C P250F
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 24-FL-003H | Service bulletin | Mar 4, 2024 | 10252354 | PDF, 268 KB |
What the document itself lists
The manufacturer titles it “ECU SOFTWARE UPDATE FOR T-GDI LOGIC IMPROVEMENT”.
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 39121-2MCN0 | — | — | |
| 39125-2MCN0 | — | — | |
| 39121-2MCN1 | — | — | |
| 39125-2MCN1 | — | — | |
| 39121-2MCN2 | — | — | |
| 39125-2MCN2 | — | — | |
| 39121-2MAL0 | — | — | |
| 39121-2MAL1 | — | — | |
| 39123-2MCN1 | — | — | |
| 39127-2MCN1 | — | — | |
| 39123-2MCN2 | — | — | |
| 39127-2MCN2 | Manual Mode Password: Event 1055 | — | eBay Motors → |
Read by machine from the document NHTSA serves (6 pages), read Sep 30, 2026. A part number is shown only where it matches Hyundai’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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 5 model years this bulletin names have filed 686 complaints with NHTSA since 2015. 118 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.
The knock sensor on the engine fails when exposed to any amount of water. The car is designed in a way that lets on too much. It’s something that is VERY common amongst owners of these vehicles. It’s a safety flaw that needs to be fixed because it puts the car in “limp” mode. That makes the car instantly halt acceleration.
2023 Hyundai Kona · Engine · filed with NHTSA Mar 10, 2024
While driving on the interstate, the car went into limp mode (does not rev above 2000 rpm). I was unable to maintain speed or merge back into interstate. The dealership has inspected the vehicle, however, they confirm everything is normal. The car did give an engine error code of P132600 for Powertrain.
2022 Hyundai Kona · Engine · filed with NHTSA Sep 3, 2024
Fuel injector randomly went out, I dont have the HPFP recall done on my car. Caused a massive amount of power loss while I was going down the road. Now hyundai wants to pretend like the HPFP had nothing to do with this. I keep being told its an emission part and isnt covered under powertrain warranty.
2022 Hyundai Elantra · Engine · filed with NHTSA Jun 2, 2026
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 group19 other manufacturer communications filed against these Hyundai models 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 |
|---|---|---|---|
| 9D1 | Service campaign | Sep 22, 2026 | Certain Kona (OS) vehicles equipped with the 1.6T-GDI engine may exhibit elevated engine-out emissions that may not meet engine-out NOx… |
| 9D3 | Service campaign | Sep 11, 2026 | Certain Elantra (ADA) vehicles may have been incorrectly updated with Cylinder Noise Detection System (CNDS) software that can set DTC P1327… |
| T6G | Warranty extension | Mar 26, 2026 | This TSB references the Op codes to use for claim submission and the Parts required based on the vehicle’s inspection results from TSB 22-01… |
| T6G TXXM | Warranty extension | Mar 26, 2026 | This TSB references the Op codes to use for claim submission and the Parts required based on the vehicle’s inspection results from TSB 22-01… |
| 26-EM-006H | Service bulletin | Mar 6, 2026 | Some Elantra (CN7) vehicles equipped with the 2.0L AKS NU PE engine may exhibit an illuminated Check Engine light for diagnostic trouble cod… |
| 25-EM-007H | Service bulletin | Dec 18, 2025 | Some Elantra (CN7, CN7A), Kona (OS, SX2), and Sonata Hybrid (DN8 HEV) vehicles equipped with 2.0L engines may illuminate a warning lamp for… |
| T9E | Service campaign | Sep 23, 2025 | Certain IONIQ Electric (AE EV) and Kona Electric (OS EV) vehicles may exhibit a restricted coolant flow condition, which may be accompanied… |
| 25-EM-004H | Service bulletin | Jun 18, 2025 | Certain Elantra N (CN7 N) vehicles may experience a rattle and/or buzzing sound coming from the rear muffler assembly at idle or on decelera… |
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 24-FL-003H a recall?
No. A service bulletin 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 24-FL-003H repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does 24-FL-003H cover?
The manufacturer filed it against 5 model years: 2023 Hyundai Elantra, 2022 Hyundai Elantra, 2021 Hyundai Elantra, 2023 Hyundai Kona, 2022 Hyundai Kona. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.