Technical Service Bulletins (TSBs) for the 2023 Sonata are official communications between Hyundai & their dealerships that describe processes for troubleshooting or fixing certain common problems. All vehicle manufacturers are required by U.S. law to make their TSBs available to the public.

    ENGINE AND ENGINE COOLING

    • TSB #24-FL-002H

      Date Announced:
      FEB 29, 2024
      NHTSA ID:
      #10251294

      This bulletin provides the procedure to update the Engine Control Module (ECM) and/or the Transmission Control Module (TCM) for 2020-2023MY Sonata (DN8/DN8a) vehicles to improve operation of the Idle Stop and Go (ISG) system. Read More »

    • TSB #23-EM-005H

      Date Announced:
      OCT 13, 2023
      NHTSA ID:
      #10247189

      This bulletin provides important checkpoint guidelines when performing engine oil and filter change services. Read More »

    • TSB #23-EE-010H

      Date Announced:
      SEP 18, 2023
      NHTSA ID:
      #10243340

      This bulletin is issued to provide the extended battery diagnosis procedure using GDS-M. This battery diagnosis function displays the various battery-related faults such as: a?? Internal short circuit a?? Battery deterioration a?? ... Read More »

    • TSB #23-FL-002H-1

      Date Announced:
      JUN 09, 2023
      NHTSA ID:
      #10238377

      This bulletin provides the diagnostic procedure for the GDI injector(s) in certain 21-23MY Sonata, 21-22MY Santa Fe, certain 22MY Santa Cruz, and certain 21-23MY Tucson equipped with 2. Read More »

    • TSB #23-EE-006H

      Date Announced:
      APR 07, 2023
      NHTSA ID:
      #10235343

      This bulletin provides the procedure to repair poor pin tension at joint connector JE202 in certain Sonata (2.5L GDI engine) with one or more DTC. Read More »

    • TSB #23-EE-005H

      Date Announced:
      APR 07, 2023
      NHTSA ID:
      #10235344

      This bulletin provides the procedure to repair poor pin tension at joint connector JE102 in certain Sonata (1.6 T-GDI engine) with one or more DTC. Read More »

    • TSB #23-AT-003H

      Date Announced:
      APR 06, 2023
      NHTSA ID:
      #10235340

      If you are servicing an 8-speed vehicle with a a??Check Enginea?? light on and one or more of the DTC listed, follow the service procedure and replace the related solenoid and harness. Read More »

    • TSB #23-FL-002H

      Date Announced:
      MAR 23, 2023
      NHTSA ID:
      #10233552

      This bulletin provides the diagnostic procedure for the GDI injector(s) in certain 21-23MY Sonata, 21-22MY Santa Fe, certain 22MY Santa Cruz, and certain MY21-23 Tucson equipped with 2. Read More »

    • TSB #23-01-023H

      Date Announced:
      MAR 20, 2023
      NHTSA ID:
      #10233545

      This bulletin provides information related to the ECU software update for Sonata Hybrid (DN8 HEV) vehicles to revise the logic for the following DTC : a?? DTC P00B7 a?? Engine Coolant Flow ... Read More »

    ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)

    • TSB #24-FL-002H

      Date Announced:
      FEB 29, 2024
      NHTSA ID:
      #10251294

      This bulletin provides the procedure to update the Engine Control Module (ECM) and/or the Transmission Control Module (TCM) for 2020-2023MY Sonata (DN8/DN8a) vehicles to improve operation of the Idle Stop and Go (ISG) system. Read More »

    • TSB #23-AT-009H

      Date Announced:
      JUL 18, 2023
      NHTSA ID:
      #10240089

      If you are servicing an 8-speed DCT front-wheel-drive vehicle with the DTC or symptoms listed below, refer to the Service Procedure to diagnose the condition. Read More »

    POWER TRAIN

    • TSB #24-AT-002H

      Date Announced:
      APR 09, 2024
      NHTSA ID:
      #10253275

      This TSB provides a procedure to diagnose and replace, if necessary, an automatic transmission with Incorrect Ratio DTC (transmission clutch slip in gear above limit) listed on Page 2. Read More »

    • TSB #24-FL-002H

      Date Announced:
      FEB 29, 2024
      NHTSA ID:
      #10251294

      This bulletin provides the procedure to update the Engine Control Module (ECM) and/or the Transmission Control Module (TCM) for 2020-2023MY Sonata (DN8/DN8a) vehicles to improve operation of the Idle Stop and Go (ISG) system. Read More »

    • TSB #23-AT-006H-2

      Date Announced:
      NOV 10, 2023
      NHTSA ID:
      #10245580

      This TSB provides information to diagnose the push button shifter operation. Read More »

    • TSB #23-AT-008H-1

      Date Announced:
      SEP 14, 2023
      NHTSA ID:
      #10243329

      If you are servicing an 8-speed front-wheel-drive vehicle equipped with automatic transaxle with one or more of the DTC or symptoms listed below, refer to the Service Procedure to diagnose the condition. Read More »

    • TSB #23-AT-012H

      Date Announced:
      AUG 28, 2023
      NHTSA ID:
      #10241890

      This bulletin provides information related to a Transmission Control Unit (TCU) software update for certain vehicles equipped with an 8-speed wet dual clutch transmissions (8WDCT) that improves the touch point learning variation. Read More »

    • TSB #23-AT-011H

      Date Announced:
      AUG 28, 2023
      NHTSA ID:
      #10241891

      This bulletin outlines changes to the service procedure regarding the replacement of 8-speed wet dual clutch transmissions (8WDCT) and associated transmission control unit (TCU). These changes only apply to vehicles equipped with Theta 2. Read More »

    • TSB #23-AT-006H-1

      Date Announced:
      AUG 01, 2023
      NHTSA ID:
      #10241796

      This TSB provides information to diagnose the push button shifter operation. If you are servicing a vehicle with any symptoms listed below or DTCs (listed on Page 2) , follow the Service Procedure on Page 3. Read More »

    • TSB #23-AT-009H

      Date Announced:
      JUL 18, 2023
      NHTSA ID:
      #10240089

      If you are servicing an 8-speed DCT front-wheel-drive vehicle with the DTC or symptoms listed below, refer to the Service Procedure to diagnose the condition. Read More »

    • TSB #23-AT-008H

      Date Announced:
      JUL 11, 2023
      NHTSA ID:
      #10240084

      If you are servicing an 8-speed front-wheel-drive vehicle equipped with automatic transaxle with one or more of the DTC or symptoms listed below, refer to the Service Procedure to diagnose the condition. Read More »

    • TSB #23-AT-002H

      Date Announced:
      MAY 10, 2023
      NHTSA ID:
      #10237183

      This bulletin provides service procedures to prevent possible moisture intrusion of the HP EOP (High Flow Electric Oil Pump) connector when servicing the 8-speed wet dual clutch transmission (8WDCT). Read More »

    POWER TRAIN:AUTOMATIC TRANSMISSION

    • TSB #23-AT-006H-1

      Date Announced:
      AUG 01, 2023
      NHTSA ID:
      #10241796

      This TSB provides information to diagnose the push button shifter operation. If you are servicing a vehicle with any symptoms listed below or DTCs (listed on Page 2) , follow the Service Procedure on Page 3. Read More »

    • TSB #23-AT-009H

      Date Announced:
      JUL 18, 2023
      NHTSA ID:
      #10240089

      If you are servicing an 8-speed DCT front-wheel-drive vehicle with the DTC or symptoms listed below, refer to the Service Procedure to diagnose the condition. Read More »

    POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION (PRNDL)

    • TSB #23-AT-009H

      Date Announced:
      JUL 18, 2023
      NHTSA ID:
      #10240089

      If you are servicing an 8-speed DCT front-wheel-drive vehicle with the DTC or symptoms listed below, refer to the Service Procedure to diagnose the condition. Read More »

    ELECTRICAL SYSTEM

    • TSB #24-BE-001H

      Date Announced:
      JAN 10, 2024
      NHTSA ID:
      #10249699

      Some vehicles equipped with the AVN 5th Gen Wide system may exhibit a condition where the radio app crashes frequently when entering radio mode and/or displays a message that reads a??Uneven Road Ahead, Drive carefullya?? on the cluster ... Read More »

    • TSB #23-EE-010H

      Date Announced:
      SEP 18, 2023
      NHTSA ID:
      #10243340

      This bulletin is issued to provide the extended battery diagnosis procedure using GDS-M. This battery diagnosis function displays the various battery-related faults such as: a?? Internal short circuit a?? Battery deterioration a?? ... Read More »

    • TSB #23-BE-007H

      Date Announced:
      JUL 17, 2023
      NHTSA ID:
      #10240087

      This Service Information bulletin provides information on how to update the Apple Carplay software from Hyundaia??s Navigation Updates page. Read More »

    ELECTRICAL SYSTEM:WIRING:POSITION/LIMIT SENSOR/SWITCH

    • TSB #23-AT-009H

      Date Announced:
      JUL 18, 2023
      NHTSA ID:
      #10240089

      If you are servicing an 8-speed DCT front-wheel-drive vehicle with the DTC or symptoms listed below, refer to the Service Procedure to diagnose the condition. Read More »

    VISIBILITY

    • TSB #24-BD-001H

      Date Announced:
      FEB 14, 2024
      NHTSA ID:
      #10251285

      This bulletin contains information about the proper removal of the windshield wiper blade protective cover on all models. Read More »

    • TSB #23-BD-002H

      Date Announced:
      JAN 30, 2023
      NHTSA ID:
      #10230904

      This bulletin provides information regarding condensation related to the accumulated moisture in the headlamp, rear combination lamp, daytime running lamp (DRL), or fog lamp. Read More »

    VISIBILITY/WIPER (PWS)

    • TSB #24-BD-001H

      Date Announced:
      FEB 14, 2024
      NHTSA ID:
      #10251285

      This bulletin contains information about the proper removal of the windshield wiper blade protective cover on all models. Read More »

    STRUCTURE:BODY

    • TSB #23-BD-007H

      Date Announced:
      APR 24, 2023
      NHTSA ID:
      #10235566

      Hyundai applies a Paint Protection Film (PPF) on new vehicles before delivery to dealerships. It provides a barrier between the paint and contaminants, such as rail dust, acid rain, and industrial fallout. Read More »

    EQUIPMENT:ELECTRICAL:INFOTAINMENT:SOFTWARE

    • TSB #23-BE-007H

      Date Announced:
      JUL 17, 2023
      NHTSA ID:
      #10240087

      This Service Information bulletin provides information on how to update the Apple Carplay software from Hyundaia??s Navigation Updates page. Read More »