Kia bulletin SC271
What it saysVOLUNTARY SERVICE CAMPAIGN: ICCU SOFTWARE UPGRADE OR ICCU ASSEMBLY AND FUSE REPLACEMENT (SC271) - This bulletin provides information to inspect the Integrated Charging Control Unit ("ICCU") in certain 2022-2023MY EV6… NHTSA’s full summary ↓
Kia filed this with NHTSA as a service bulletin dated Jul 13, 2023, received Aug 2, 2023, about the electrical system — 3 documents under this number: SC271_TSB, SC271_OWNR, SC271_QA. It names 2 model years (2022–2023). 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 communicationPicked out of NHTSA’s summary below, word for word. The document itself is the record, and the dealer checks the VIN.
What 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.
VOLUNTARY SERVICE CAMPAIGN: ICCU SOFTWARE UPGRADE OR ICCU ASSEMBLY AND FUSE REPLACEMENT (SC271) - This bulletin provides information to inspect the Integrated Charging Control Unit ("ICCU") in certain 2022-2023MY EV6 (CV) vehicles manufactured from November 17, 2021 through May 30, 2023. Depending on the results of the inspection, dealers are to either install an improved ICCU software logic or replace the ICCU and ICCU Fuse. The ICCU in the subject vehicle may get damaged due to an over-current condition in the high-voltage system. This condition may cause the illumination of the "Service Warning Light," "Check electric vehicle system", and/or "Stop vehicle and check power supply" warning messages, along with audible beeps, instructing the driver to stop the vehicle at a safe location.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| SC271_TSB | Service bulletin | Jul 13, 2023 | 10239742 | PDF, 1,974 KB |
| SC271_OWNR | Service bulletin | Jul 13, 2023 | 10239739 | PDF, 165 KB |
| SC271_QA | Service bulletin | Jul 11, 2023 | 10239741 | PDF, 107 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 2 model years this bulletin names have filed 417 complaints with NHTSA since 2015. 331 of them name Electrical System, 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 2022 Kia EV6, the 15 owners who gave an odometer reading for Electrical System reported it at a median of 16,030 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
Vehicle does not reliably handle the 12V battery well. Many times, I see it sitting at 12.8 VDC when driving the vehicle. On a ICE vehicle, the charging voltage is close to 14V when running/driving. On 3 separate occasions, when I tried to "start" the EV6, the 12V battery was too dead to allow the car to be started. Basically stranded.
2023 Kia EV6 · Electrical System · filed with NHTSA Apr 3, 2024 · ODI 11581040
While operating and driving on a busy two lane roadway, about an hour in to a two hour trip, the vehicle displayed “check electrical system” message without warning, then quickly lost power, rendering the car only able to drive at 25 mph for a brief moment, and then, just as quickly, shut down completely and did not operate.
2022 Kia EV6 · Electrical System · filed with NHTSA Apr 21, 2023 · ODI 11518378
Component/System Failure: The main components that failed or malfunctioned include the vehicle's charging system and battery management system, leading to significant range discrepancies and charging issues. Additionally, the coolant system issue suggests a failure in the vehicle's cooling system.
2023 Kia EV6 · Engine · filed with NHTSA Feb 25, 2024 · ODI 11573888
In depth: 2023 Kia EV6 electrical problems → · 2022 Kia EV6 electrical 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 electrical system
Source: same model, same component group37 other manufacturer communications filed against the Kia EV6 under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Kia list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| PI2606 | Other | Sep 4, 2026 | TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: This bulletin provides information to upgrade the 12-volt battery… |
| PI2605 | Other | Sep 2, 2026 | TECHNICAL SERVICE BULLETIN: PRODUCT IMPROVEMENT CAMPAIGN: BMU LOGIC IMPROVEMENT (PI2605) - This bulletin provides information regarding a Ba… |
| TSB_CLI049_R2 | Service bulletin | Aug 28, 2026 | TECHNICAL SERVICE BULLETIN: PARTIAL REPAIR – ELECTRICAL A/C COMPRESSOR - This bulletin has been revised to include additional information. N… |
| TSB_ELE422 | Service bulletin | May 28, 2026 | TECHNICAL SERVICE BULLETIN: INFOTAINMENT SYSTEM SOFTWARE UPDATE USING UPDATE. KIA. COM - This bulletin provides information and service proc… |
| WTY044 | Warranty extension | Apr 23, 2026 | WARRANTY EXTENSION CAMPAIGN: TECHNICAL SERVICE BULLETIN: ICCU INSPECTION/REPLACEMENT (WTY044) - This bulletin provides information associate… |
| TSB_ELE417 | Service bulletin | Apr 14, 2026 | TECHNICAL SERVICE BULLETIN: INFOTAINMENT SOFTWARE UPDATE PROCEDURE - This bulletin provides information on the process for downloading infot… |
| SA635 | Over-the-air update | Feb 10, 2026 | TECHNICAL SERVICE BULLETIN: SERVICE ACTION: DCU OPERATIONSOFTWARE LOGIC IMPROVEMENT (SA635) - This bulletin has been revised to include addi… |
| SC327Y | Service bulletin | Jan 16, 2026 | TECHNICAL SERVICE BULLETIN: SUBSEQUENT REPAIR ACTION: ICCU AND FUSE REPLACEMENT (SC327Y) - This bulletin provides information related to the… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Kia, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Kia SC271 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 SC271 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 Kia warranty extension on file lists the ones Kia has filed.
Which vehicles does SC271 cover?
The manufacturer filed it against 2 model years: 2023 Kia EV6, 2022 Kia EV6. 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: 2022 -2023MY EV6 (CV): built 17 Nov 2021 – 30 May 2023 — the build date is on the certification label in the driver’s door jamb.