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Service bulletins for the 2025 Kia Carnival

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.

56 on file from NHTSA, as of 2026-10-19.

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By component

By trouble code

Bulletins, newest first
SC352_TSB2025-12-01. Service bulletin. ELECTRICAL SYSTEM. VOLUNTARY SERVICE CAMPAIGN: HVAC SOFTWARE UPGRADE FOR PTC OPERATION LOGIC IMPROVEMENT (SC352) - This bulletin provides information to upgrade the Heating, Ventilation, and Air Conditioning (HVAC) control software on certain 2025-2026MY Carnival HEV (KA4 HEV) vehicles produced from May 16, 2024 through September 8, 2025, to prevent excessive discharging of the 12V battery by the Positive Temperature Coefficient (PTC) heater under certain operating conditions. When the engine is below operating temperature, the PTC heater is used to provide additional heat to the cabin. In very cold environments and under high electrical load, the PTC heater in the subject vehicles may discharge the 12V battery faster than it can charge. If the 12V battery becomes excessively discharged, the vehicle may enter Limp Home Mode with speed temporarily limited to a maximum of 31mph until the vehicle reaches normal operating temperature. There are no warning lamps or warning messages associated with this condition.
TSB_ELE403_R12025-12-01. Service bulletin. VISIBILITY/WIPER. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: A/C COMPRESSOR REPLACEMENT (SA632) - This bulletin has been revised as a Combination TSB/SA and includes additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information to address air conditioning performance issues reported on certain 2025-2026 model year Carnival (KA4) vehicles produced between December 1, 2024, and June 12, 2025. Customers may experience intermittent cooling or insufficient cooling at low blower speeds. The cause may be excessive clearance between the compressor piston and cylinder, which reduces refrigerant compression and results in inconsistent or weak cooling performance.
TSB_ELE4032025-12-01. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY/WIPER. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: A/C COMPRESSOR REPLACEMENT (SA632) - This bulletin provides information to address air conditioning performance issues reported on certain 2025- 2026 model year Carnival (KA4) vehicles produced between December 1, 2024, and June 12, 2025. Customers may experience intermittent cooling or insufficient cooling at low blower speeds. The cause may be excessive clearance between the compressor piston and cylinder, which reduces refrigerant compression and results in inconsistent or weak cooling performance.
PSD_REMINDER2_1022025-10-08. Other. ELECTRICAL SYSTEM; STRUCTURE:BODY. IMPORTANT REMINDER: CARNIVAL POWER SLIDING DOOR FEATURE: OWNER NOTIFICATION (KA4PSD2 FLIGHT 102) - This document is the owner notification advising Kia's ongoing commitment to providing Kia Carnival vehicle owners with a superior ownership experience. This is reminder about the proper use of the power sliding door and its automatic stop and reversal feature in your 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.
PSD_REMINDER22025-07-31. Other. STRUCTURE:BODY; ELECTRICAL SYSTEM. IMPORTANT REMINDER: CARNIVAL POWER SLIDING DOOR FEATURE: OWNER NOTIFICATION (KA4PSD2) - This document is the owner notification advising Kia's ongoing to providing you with a superior ownership experience, we’d like to remind you about the proper use of the power sliding door and its automatic stop and reversal feature in your 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.
TSB_ELE3862025-07-01. Service bulletin. ELECTRICAL SYSTEM; ENGINE. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: MCU DTC LOGIC IMPROVEMENT (SA617) - This bulletin provides information to upgrade the Motor Control Unit ‘MCU’ system software on certain 2025MY Carnival HEV (KA4 HEV) vehicles produced from June 27, 2024, through March 19, 2025. The affected vehicles may exhibit an intermittent Malfunction Indicator Lamp ‘MIL’ illuminated on the instrument cluster with DTC P0C7300. The DTC is caused by a software logic error within the Integrated Thermal Management Module ‘ITM’, which controls the coolant flow rate according to the coolant temperature.
SC333_QA2025-06-25. Emissions. ENGINE; FUEL/PROPULSION SYSTEM. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: QUESTION AND ANSWER (SC333) - This document is the Question and Answer Guide containing the most frequently asked questions regarding the Voluntary Emissions Service Campaign SC333.
OTA_SA6172025-06-19. Over-the-air update. ELECTRICAL SYSTEM; ENGINE. RELEASE NOTES: OVER-THE-AIR: SERVICE ACTION SOFTWARE UPDATE FOR ELECTRIC WATER PUMP (SA617) - This Over-the-Air (OTA) software update is designed to update the Motor Control Unit (MCU) logic of certain 2025 Carnival vehicles. This update is designed to improve the control logic of the Electric Water Pump to reduce the unintended display of warning lights.
SC333_TSB2025-06-11. Service bulletin. ENGINE; FUEL/PROPULSION SYSTEM. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: ENGINE CONTROL MODULE LOGIC IMPROVEMENT (SC333) - This bulletin provides information to upgrade the ‘Engine Control Module’ (ECM) system software on certain 2025MY Carnival (KA4) vehicles equipped with 3.5L GDI Lambda Ⅲ engines produced from April 15, 2024 through November 27, 2024. The subject vehicles may have been produced with engine calibration that may cause the vehicle to release air pollutants that exceed Federal and California standards and cause the illumination of the Malfunction Indicator Lamp (MIL) with DTC P046100. These standards were established to protect the public health and welfare from the dangers of air pollutants.
SC333_STKR2025-06-11. Emissions. FUEL/PROPULSION SYSTEM; ENGINE. SC333_STKR: VOLUNTARY EMISSIONS SERVICE CAMPAIGN COMPLETION LABEL/STICKER
SC333_POC2025-06-11. Emissions. FUEL/PROPULSION SYSTEM; ENGINE. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: SC333_POC: PROOF OF CORRECTION CARD
SC333_OWNR2025-06-11. Emissions. ENGINE; FUEL/PROPULSION SYSTEM. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: OWNER NOTIFICATION (SC333) - This document is the owner notification advising that Kia is conducting a Voluntary Emissions Service Campaign to improve the emissions software logic in the Electronic Control Module (ECM) on certain 2025 MY Carnival vehicles equipped with 3.5L Gas Direct Injection (GDI) engines to ensure compliance with emissions regulations.
SC333_DPSM2025-06-11. Emissions. ENGINE; FUEL/PROPULSION SYSTEM. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: DEALER PARTS AND SERVICE MANAGER MEMO (SC333) - This document is the announcement to the dealer Parts and Service managers advising that Kia is conducting a Voluntary Emissions Service Campaign on certain 2025 MY Kia Carnival vehicles equipped with 3.5L Gas Direct Injection (GDI) engines manufactured from April 15, 2024 to November 27, 2024 to improve the emissions software logic in the Electronic Control Module (ECM) to ensure compliance with emissions regulations.
SC333_DP2025-06-11. Emissions. FUEL/PROPULSION SYSTEM; ENGINE. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: DEALER PRINCIPAL MEMO (SC333) - This document is the announcement to the dealer principals advising that Kia is conducting a Voluntary Emissions Service Campaign on certain 2025 MY Kia Carnival vehicles equipped with 3.5L Gas Direct Injection (GDI) engines manufactured from April 15, 2024 to November 27, 2024 to improve the emissions software logic in the Electronic Control Module (ECM) to ensure compliance with emissions regulations.
TSB_TRA046_R52025-04-23. Service bulletin. POWER TRAIN. TECHNICAL SERVICE BULLETIN: TRANSMISSION FLUID APPLICATION GUIDE - 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 relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced, and the transmission oil cooler is transferred to the new transmission.
PI2501_TSB2025-03-25. Service bulletin. SEATS. TECHNICAL SERVICE BULLETIN: PRODUCT IMPROVEMENT CAMPAIGN: 2ND -ROW SEAT RAIL COVER INSTALLATION (PI2501) - This bulletin provides information to install new 2nd -row seat rail covers on all 2022-2024MY, and certain 2025MY Carnival (KA4) vehicles manufactured from January 4, 2021 through March 31, 2025. The subject vehicles are equipped with seat rails on the interior floor of the passenger compartment which allow for the adjustment of the 2nd -row seats. Under certain operating conditions in high temperature environments, the 2nd -row seat rails may become warm or hot to the touch. A hot seat rail can result in discomfort if an occupant touches the seat rail with their bare skin. This campaign is to install covers on the 2nd -row seat rails that reduce the surface temperature of the rails and improve the vehicle occupants’ experience.
PI2501_OWNR2025-03-25. Other. SEATS. PRODUCT IMPROVEMENT CAMPAIGN: OWNER NOTIFICATION (PI2501) - This document is the owner notification advising that Kia conducting an important Product Improvement Campaign to install covers onto the 2nd row seat rails in all 2022-2024 MY Kia Carnival vehicles and certain 2025 MY Carnival vehicles.
PI2501_QA2025-03-25. Other. SEATS. PRODUCT IMPROVEMENT CAMPAIGN: QUESTION AND ANSWER (PI2501) - This document is the Question and Answer Guide containing the most frequently asked questions regarding the Product Improvement Campaign PI2501.
PI2501_DPSM2025-03-25. Other. SEATS. PRODUCT IMPROVEMENT CAMPAIGN: DEALER PARTS AND SERVICE MANAGER MEMO (PI2501) - This document is the announcement to the dealer Parts and Service managers advising that Kia is conducting an important Product Improvement Campaign to install covers onto the 2nd row seat rails in all 2022-2024 MY Kia Carnival vehicles and certain 2025 MY Carnival vehicles manufactured from January 4, 2021 through March 31, 2025.
PI2501_DP2025-03-25. Other. SEATS. PRODUCT IMPROVEMENT CAMPAIGN: DEALER PRINCIPAL MEMO (PI2501) - This document is the announcement to the dealer principals advising that Kia is conducting an important Product Improvement Campaign to install covers onto the 2nd row seat rails in all 2022-2024 MY Kia Carnival vehicles and certain 2025 MY Carnival vehicles manufactured from January 4, 2021 through March 31, 2025.
TSB_ELE341_R42025-03-08. Service bulletin. ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: COMBINATION TSB/SERVICE ACTION: CCNC – DEALER MODE, FACTORY & NETWORK RESET (SA613) - This bulletin has been revised as a Combination TSB/SA and includes additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information to access the ‘Dealer Mode’ function on 2024MY~ models listed on page 5 equipped with a Connected Car Navigation Cockpit (ccNC) head unit, and to perform a ‘Reset Network’ and/or ‘Factory Reset’ to address customer concerns related to activation of Kia Connect or Kia Connect features that may have stopped working.
TSB_ELE3662025-02-05. Service bulletin. ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: DRIVE MODE BUTTON COVER REPLACEMENT (SA597) - This bulletin provides the procedure to replace the ‘Drive Mode’ button cover on certain 2025MY Carnival HEV (KA4 HEV) vehicles produced from August 23, 2024 through October 19, 2023, which may exhibit a stuck or “sticky” ‘Drive Mode’ button operation. Due to variations in ambient temperature, the ‘Drive Mode’ button cover material may expand or contract, preventing the button from returning to the default position.
TSB_ELE368_R12025-01-30. Service bulletin. ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: KIA CONNECT ACTIVATION FAILURE (SA600) - 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 access the ‘Dealer Mode’ function and perform a ‘Reset Network’ on certain 2025MY Multiple Model vehicles listed on page 7 equipped with a Connected Car Navigation Cockpit (ccNC) head unit to address customer concerns related to activation of Kia Connect due to missing modem data caused by a data transmission error.
TSB_ELE3682025-01-23. Service bulletin. ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: KIA CONNECT ACTIVATION FAILURE (SA600) - This bulletin provides information to access the ‘Dealer Mode’ function and perform a ‘Reset Network’ on certain 2025MY Multiple Model vehicles listed on page 7 equipped with a Connected Car Navigation Cockpit (ccNC) head unit to address customer concerns related to activation of Kia Connect due to missing modem data caused by a data transmission error.
OTA_SA5932024-11-21. Over-the-air update. ELECTRICAL SYSTEM. OVER-THE-AIR: SOFTWARE UPDATE FOR CENTRAL COMMUNICATION UNIT (SA593) - This Over-the-Air (OTA) software update is designed to update the Central Communication Unit (CCU) logic of certain 2025 Carnival vehicles. This update is designed to help reduce auxiliary battery power consumption while the vehicle is turned off.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.