Service campaign SC352_DP

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)
Type	Service campaign
NHTSA id	11025856
Published by NHTSA	2025-12-01
Manufacturer's number	SC352_DP
Manufacturer's date	2025-11-10
Campaign id or software version	SC352
NHTSA component	ELECTRICAL SYSTEM

NHTSA's summary

VOLUNTARY SERVICE CAMPAIGN: DEALER PRINCIPAL MEMO (SC352) - This document is the announcement to the dealer principals advising that Kia is conducting a Voluntary Service Campaign on certain 2025-2026 MY Carnival Hybrid (HEV) vehicles manufactured from May 16, 2024 through September 8, 2025 to update the Heating, Ventilation, and Air Conditioning (HVAC) control software to prevent excessive discharging of the 12V battery by the Positive Temperature Coefficient (PTC) heater under certain operating conditions.

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

Electrical system

Vehicles listed
KIA CARNIVAL HYBRID	2025, 2026 (the catalog's model; the bulletin names a series or trim of it)

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

Recalls for the same vehicles and component
26V046000	2026-01-26. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

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
OTA_ELE413_NOTES_R2	2026-06-18. Over-the-air update. RELEASE NOTES: OVER-THE-AIR: SOFTWARE UPDATE FOR DATA CONNECTIVITY (ELE413 Revision 2) - This Over-the-Air (OTA) software update is designed to update the Data Connectivity Unit (DCU) logic of certain 2025 - 2026MY Carnival, EV9, K5 and Sorento vehicles. This update is designed to improve the vehicle’s network communication performance.
TSB_ELE422	2026-06-03. Service bulletin. TECHNICAL SERVICE BULLETIN: INFOTAINMENT SYSTEM SOFTWARE UPDATE USING UPDATE.KIA.COM - This bulletin provides information and service procedures for updating the infotainment systems on applicable Kia vehicles using the Kia Navigation Updater available at update.kia.com. The software update may improve system performance, enhance existing features, and apply the latest operating software for supported vehicles (2021-2026MY All Models).
OTA_ELE413_NOTES_R1	2026-05-01. Over-the-air update. RELEASE NOTES: OVER-THE-AIR: SOFTWARE UPDATE FOR DATA CONNECTIVITY (ELE413 Revision 1) - This Over-the-Air (OTA) software update is designed to update the Data Connectivity Unit (DCU) logic of certain 2025 - 2026MY Carnival, 2025 - 2026MY K5 and 2025 - 2026MY Sorento vehicles. This update is designed to improve the vehicle’s network communication performance.
TSB_ELE417	2026-05-01. Service bulletin. TECHNICAL SERVICE BULLETIN: INFOTAINMENT SOFTWARE UPDATE PROCEDURE - This bulletin provides information on the process for downloading infotainment software updates and preparing USB for installation on applicable Kia vehicles. The software downloads and USB preparation process is similar across all supported platforms; however, in‑vehicle installation procedures vary by head unit type.
TSB_ELE413	2026-03-31. Service bulletin. TECHNICAL SERVICE BULLETIN: DCU COMMUNICATION LOGIC IMPROVEMENT - This bulletin provides the procedure to upgrade the Data Connectivity Unit (DCU) system software on some 2025–2026MY vehicles listed in the table below. Kia has identified that Connected Car Services (CCS) functionality may intermittently fail due to temporary DCU communication issues. This condition can impact convenience and connectivity features by causing the Remote Start and Remote Climate functions to become inoperative, prevent vehicle status updates in the Kia Access app, and interrupt connected navigation routing services.
PS807	2026-03-12. Service bulletin. PITSTOP: TECHNICAL OPERATIONS: CCU FUSE OPEN AFTER WIRING HARNESS REPLACEMENT - This Pitstop provides information regarding a condition on 2022-2026MY Carnival (KA4 and KA4 HEV) vehicles in which the CCU 10A fuse may open and multiple warning lights may illuminate after replacement of the front dash wiring harness.
PS798	2026-01-16. Other. PITSTOP: TECHNICAL OPERATIONS: CCRC WITH DTC B281600 (PS798) - This Pitstop provides information regarding DTC B281600 stored on some 2025 - 2026MY Carnival (KA4, KA4 HEV) vehicles equipped with Connected Car Rear Cockpit ‘ccRC’ rear seat entertainment screens. When performing a diagnostic scan using the Kia Diagnostic System ‘KDS’, DTC B281600 can become stored but does not cause any concerns with functionality of the ccRC system. DTC B281600 does not trigger any warning lights and does not indicate any hardware malfunction within the ccRC system and does not perform any meaningful diagnostic function. No further diagnosis, Techline case and/or repairs are necessary for DTC B281600 unless there is an active customer complaint of the ccRC system. This issue is expected to be resolved through a future ccRC Over-The-Air ‘OTA’ update.
PSD_REMINDER_103	2025-12-24. Other. IMPORTANT REMINDER: CARNIVAL POWER SLIDING DOOR FEATURE: OWNER NOTIFICATION (KA4PSD2 FLIGHT 103) - This document is the owner notification advising Kia's ongoing commitment to providing vehicle owners with a superior ownership experience. We would like to remind vehicle owners about the proper use of the power sliding door and its automatic stop and reversal feature in the Kia Carnival. The power sliding door feature is designed to enhance accessibility and ease of use, but it’s important to understand its functions and limitations to ensure safe and reliable operation.
SC352_OWNR	2025-12-02. Service campaign. VOLUNTARY SERVICE CAMPAIGN: OWNER NOTIFICATION (SC352) - This document is the owner notification advising that Kia is conducting a Voluntary Service Campaign on certain 2025-2026 MY Carnival Hybrid (HEV) vehicles to update the Heating, Ventilation, and Air Conditioning (HVAC) control software to prevent excessive discharging of the 12V battery by the Positive Temperature Coefficient (PTC) heater under certain operating conditions.
SC352_DPSM	2025-12-01. Service campaign. VOLUNTARY SERVICE CAMPAIGN: DEALER PARTS AND SERVICE MANAGER MEMO (SC352) - This document is the announcement to the dealer Parts and Service managers advising that Kia is conducting a Voluntary Service Campaign on certain 2025-2026 MY Carnival Hybrid (HEV) vehicles manufactured from May 16, 2024 through September 8, 2025 to update the Heating, Ventilation, and Air Conditioning (HVAC) control software to prevent excessive discharging of the 12V battery by the Positive Temperature Coefficient (PTC) heater under certain operating conditions.