Hyundai bulletin 26-EM-006H
What it saysSome Elantra (CN7) vehicles equipped with the 2.0L AKS NU PE engine may exhibit an illuminated Check Engine light for diagnostic trouble code (DTC) P218100 or P013300 which are related to the Integrated Thermal… NHTSA’s full summary ↓
Hyundai filed this with NHTSA as a service bulletin dated Mar 6, 2026, received Mar 11, 2026, about the engine — 1 document under this number: 26-EM-006H TSB. It names 2 model years (2024–2025). 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 communicationWhat it applies to, as NHTSA’s summary states it — build dates and equipment as the manufacturer filed them. The dealer checks the VIN and the build date on the door jamb; a vehicle outside the window is not covered by this bulletin.
Some Elantra (CN7) vehicles equipped with the 2.0L AKS NU PE engine may exhibit an illuminated Check Engine light for diagnostic trouble code (DTC) P218100 or P013300 which are related to the Integrated Thermal Management Module (ITM) and Oxygen Sensor monitoring. This bulletin provides instructions to update the Engine Control Module (ECM) logic to resolve the condition.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 26-EM-006H TSB | Service bulletin | Mar 6, 2026 | 11029942 | PDF, 429 KB |
What the document itself lists
The manufacturer titles it “ECU SOFTWARE UPDATE FOR ITM LOGIC & OXYGEN”.
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 39100-2J340 | — | — | |
| 39100-2J341 | — | — | |
| 39100-2J342 | — | — |
Read by machine from the document NHTSA serves (6 pages), read Sep 29, 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 2 model years this bulletin names have filed 98 complaints with NHTSA since 2015. 15 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 vehicle experienced a catastrophic engine compartment fire while safely parked inside an employment parking garage in on XXX, at approximately 3:04 PM. I was physically sitting inside the vehicle cabin when heavy smoke suddenly began pouring out from the engine bay. I immediately evacuated the vehicle for my safety.
2024 Hyundai Elantra · Engine · filed with NHTSA Jul 15, 2026 · ODI 11750544
HYBRID SYSTEM FAILURE ----- 2025 Hyundai Elantra Hybrid (blue trim) The instrument panel showed Hybrid System Failure, and the ENGINE DIED on the freeway at 70 mph. Luckily, I was able to pull to the right shoulder on a busy freeway.
2025 Hyundai Elantra · Engine · filed with NHTSA Feb 12, 2026 · ODI 11717631
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 group18 other manufacturer communications filed against the Hyundai Elantra 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-016H | Service bulletin | Oct 8, 2026 | Some vehicles equipped with internal combustion engines may exhibit higher-than-expected engine oil consumption. This bulletin outlines the… |
| 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… |
| 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… |
| 26-EE-003H | Service bulletin | Apr 18, 2026 | Some vehicles may exhibit difficulty starting in cold weather. This bulletin provides the procedure to perform an inspection on the starter… |
| 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… |
| 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… |
| 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 26-EM-006H 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 26-EM-006H 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. Every Hyundai warranty extension on file lists the ones Hyundai has filed.
Which vehicles does 26-EM-006H cover?
The manufacturer filed it against 2 model years: 2025 Hyundai Elantra, 2024 Hyundai Elantra. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.