Service bulletin PS807

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 bulletin
NHTSA id	11029974
Published by NHTSA	2026-03-12
Manufacturer's number	PS807
Manufacturer's date	2026-03-05
NHTSA component	ELECTRICAL SYSTEM

NHTSA's summary

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.

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	2022, 2023, 2024, 2025, 2026
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
2023149	2023-03-17. Electrical

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
WTY048_TSB	2026-09-02. Service bulletin. TECHNICAL SERVICE BULLETIN: HORN ASSEMBLY INSPECTION/REPLACEMENT (WTY048) - This bulletin provides information associated with the Warranty Extension Program (WTY048) to inspect and, if necessary, replace both the high-pitch and low-pitch horn assemblies on certain 2022-2024MY Carnival (KA4) vehicles produced from January 4, 2021 through July 4, 2024. The affected vehicles may experience a distorted or inoperative horn sound caused by excessive moisture and dust exposure over time. The warranty coverage for repairs related to the horn assembly has been extended from 5 years / 60,000 miles to 10 years / 120,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY048_QA	2026-09-02. Warranty extension. WARRANTY EXTENSION CAMPAIGN: QUESTION AND ANSWER (WTY048) - This document is the Question and Answer Guide containing the most frequently asked questions regarding the Warranty Extension Campaign WTY048.
WTY048_OWNR	2026-09-02. Warranty extension. WARRANTY EXTENSION CAMPAIGN: OWNER NOTIFICATION (WTY048) - This document is the owner notification advising that Kia is extending the New Vehicle Limited Warranty coverage, to all owners, for repairs related to the horn assembly in certain 2022-2024 MY Carnival vehicles from 5 years / 60,000 miles to 10 years / 120,000 miles, whichever comes first, starting from the date the vehicle was first put into service. This warranty extension is to address a horn sound malfunction condition free of charge at no cost to the customer.
WTY048_DPSM	2026-09-02. Warranty extension. WARRANTY EXTENSION CAMPAIGN: DEALER PARTS AND SERVICE MANAGER MEMO (WTY048) - This document is the announcement to the dealer Parts and Service managers advising that Kia is extending the New Vehicle Limited Warranty coverage, to all owners, for repairs related to the horn assembly for certain 2022-2024 MY Carnival vehicles manufactured from January 4, 2021 through July 4, 2024, from 5 years / 60,000 miles to 10 years / 120,000 miles, whichever comes first, from the date the vehicle was first put into service. This warranty extension is to address a horn sound malfunction condition.
WTY048_DP	2026-09-02. Warranty extension. WARRANTY EXTENSION CAMPAIGN: DEALER PRINCIPAL MEMO (WTY048) - This document is the announcement to the dealer principals advising that Kia is s extending the New Vehicle Limited Warranty coverage, to all owners, for repairs related to the horn assembly for certain 2022-2024 MY Carnival vehicles manufactured from January 4, 2021 through July 4, 2024, from 5 years / 60,000 miles to 10 years / 120,000 miles, whichever comes first, from the date the vehicle was first put into service. This warranty extension is to address a horn sound malfunction condition.
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.