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Service bulletin TSB_ENG264

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11030379
Published by NHTSA2026-04-01
Manufacturer's numberTSB_ENG264
Manufacturer's date2026-04-01
Campaign id or software versionCA2516
NHTSA componentENGINE
Manufacturer's systemENG

NHTSA's summary

TECHNICAL SERVICE BULLETIN: CUSTOMER ACTION: ECU LOGIC IMPROVEMENT FOR DTC P2B59F0 (CA2516) - This bulletin provides information to upgrade the Engine Control Unit (ECU) software on certain 2024–2025MY vehicles equipped with 2.5 GDI or 2.5 T-GDI Theta III engines listed in the table below. Affected vehicles may experience an illuminated malfunction indicator light (MIL) accompanied with DTC P2B59F0 which can set while driving. There are no drivability issues related to this DTC.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Trouble codes named

P2B59

Vehicles listed
KIA K52025
KIA SORENTO2024, 2025
KIA SPORTAGE2024, 2025

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
25V5480002025-08-25. ENGINE AND ENGINE COOLING:CRITICAL FASTENERS

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
SC353_QA2025-12-02. Service campaign. VOLUNTARY SERVICE CAMPAIGN: QUESTION AND ANSWER (SC353) - This document is the Question and Answer Guide containing the most frequently asked questions regarding the Voluntary Service Campaign SC353.
SC353_DP2025-12-02. Service campaign. VOLUNTARY SERVICE CAMPAIGN: DEALER PRINCIPAL MEMO (SC353) - This document is the announcement to the dealer principals advising that Kia is conducting a Voluntary Service Campaign on 11 units of 2025 MY Sorento vehicles, manufactured from December 18, 2024 through February 24, 2025, to replace the engine with a new one.
SC353_DPSM2025-12-02. Service campaign. VOLUNTARY SERVICE CAMPAIGN: DEALER PARTS AND SERVICE MANAGER MEMO () - This document is the announcement to the dealer Parts and Service managers advising that Kia is conducting a Voluntary Service Campaign on 11 units of 2025 MY Sorento vehicles, manufactured from December 18, 2024 through February 24, 2025, to replace the engine with a new one.
SC353_OWNR2025-12-02. Service campaign. VOLUNTARY SERVICE CAMPAIGN: OWNER NOTIFICATION (SC353) - This document is the owner notification advising that Kia is conducting a Voluntary Service Campaign on certain 2025 MY Sorento vehicles, manufactured from December 18, 2024 through February 24, 2025, to replace the engine with a new one.
SC353_TSB2025-12-02. Service bulletin. TECHNICAL SERVICE BULLETIN: VOLUNTARY SERVICE CAMPAIGN: ENGINE REPLACEMENT FOR COOLANT LEAK (SC353) - This bulletin provides information to address an engine coolant leak concern on certain 2025MY Sorento (MQ4a) vehicles equipped with a 2.5L Theta III T-GDI engine produced from December 18, 2024 through February 24, 2025 (see the list of 11 affected VINs below). The engine block in the subject vehicles may have a fracture, which can result in a coolant leak. Over time, continuing to operate the vehicle with this condition may result in an ‘Engine Overheated’ warning message displayed on the instrument cluster and cause damage to the vehicle’s engine.
SC320_TSB_R12025-12-02. Service bulletin. TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: EGR VALVE ASSEMBLY REPLACEMENT (SC320) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information to replace the Exhaust Gas Recirculation (EGR) Valve Assembly on certain 2024MY Kia vehicles listed in the table below. Kia has become aware that the EGR Valve Assembly in the subject vehicles may not have been manufactured to Kia’s specifications. This condition may cause the vehicle to release air pollutants which exceed Federal and California standards. As a result, the subject vehicles may exhibit an illumination of Malfunction Indicator Lamp (MIL) with DTC(s) P040500, P064200 and/or P065200.
SC318_TSB2024-11-14. Service bulletin. TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: ECM LOGIC UPDATE (SC318) - This bulletin provides the procedure to update the software logic of the Engine Control Module (ECM) system on certain 2024MY Sorento (MQ4a) vehicles equipped with 2.5L T-GDI Theta III engines produced from December 7, 2023 through February 26, 2024. The subject vehicles may have engine calibrations that were not optimized for emissions standards under certain specific conditions, which may cause the vehicle to release air pollution which exceed Federal and California standards. As a result, the subject vehicles may exhibit an illumination of the Malfunction Indicator Lamp (MIL) with DTC P060547.
SC318_QA2024-11-14. Emissions. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: QUESTION AND ANSWER (SC318) - This document is the Question and Answer Guide containing the most frequently asked questions regarding the Voluntary Emissions Service Campaign SC318.
SC318_OWNR2024-11-14. Emissions. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: SAMPLE OWNER NOTIFICATION TO THE DEALERS (SC318) - This document is the owner notification (sample) mailed to the dealers advising that Kia is conducting a Voluntary Emissions Service Campaign to improve the emissions logic in the Electronic Control Module (ECM) on certain 2024 MY Sorento vehicles equipped with 2.5L Turbo Gas Direct Injection (T-GDI) engines to ensure compliance with emissions regulations.
SC318_DPSM2024-11-14. Emissions. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: DEALER PARTS AND SERVICE MANAGER MEMO (SC318) - This document is the announcement to the dealer Parts and Service managers advising that Kia is conducting a Voluntary Emissions Service Campaign on certain 2024 MY Kia Sorento vehicles equipped with 2.5L Turbo Gas Direct Injection (T-GDI) engines manufactured from December 7, 2023 to February 26, 2024 to update the emissions software logic in the Electronic Control Module (ECM) to ensure compliance with emissions regulations.