2021 Hyundai Sonata Hybrid
TSBs (Technical Service Bulletins)
Technical Service Bulletins (TSBs) for the 2021 Sonata Hybrid 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.
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TSB #218/231 amend
Certain vehicles may develop a bearing noise within the Motor Driven Power Steering (MDPS) column worm shaft assembly. If bearing noise is heard, follow the procedure in this bulletin to replace the worm shaft bearing. Read More »
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TSB #22-ST-005H
Certain vehicles may develop a bearing noise within the Motor Driven Power Steering (MDPS) column worm shaft assembly. If bearing noise is heard, follow the procedure in this bulletin to replace the worm shaft bearing. Read More »
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TSB #22-ST-005H
Certain vehicles may develop a bearing noise within the Motor Driven Power Steering (MDPS) column worm shaft assembly. If bearing noise is heard, follow the procedure in this bulletin to replace the worm shaft bearing. Read More »
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TSB #21-ST-003H
Certain vehicles may develop a bearing noise within the Motor Driven Power Steering (MDPS) column worm shaft assembly. Read More »
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TSB #21-BR-002H
This bulletin provides best practice recommendations when performing brake service procedures. Read More »
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TSB #Certain vehicles
If you are servicing an applicable vehicle with a a??Check Enginea?? light on and one or more of the DTC listed below, follow the Service Procedure and replace the harness with an integrated oil temperature sensor. Read More »
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TSB #23-01-093H
This bulletin provides the procedure to update the Hybrid Control Unit (HCU) and Dual Automatic Temperature Control (DATC) software to help improve coolant flow to the Exhaust Heat Recovery System (EHRS). Read More »
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TSB #23-EM-009H
Certain 2020-2023MY Sonata Hybrid (DN8 HEV) vehicles may exhibit coolant leakage, engine overheating, and white smoke from the exhaust due to an internal leak at the Exhaust Heat Recovery System (EHRS) portion of the center muffler ... Read More »
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TSB #23-EM-005H
This bulletin provides important checkpoint guidelines when performing engine oil and filter change services. Read More »
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TSB #22-AT-010H
If you are servicing an applicable vehicle with a a??Check Enginea?? light on and one or more of the DTC listed below, follow the Service Procedure and replace the valve body internal harness and the input/output speed sensor. Read More »
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TSB #22-EM-010H
Follow the guidelines outlined in this bulletin to inspect and clean or replace certain components of the engine intake system accordingly during engine short block or sub-assembly replacement. Read More »
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TSB #22-AT-008H
If you are servicing an applicable vehicle with a a??Check Enginea?? light on and one or more of the DTC listed below, follow the Service Procedure and replace the related solenoid and harness. Read More »
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TSB #21-EM-004H
This bulletin provides the service procedure for engine connecting rod bearing clearance testing. Perform the procedure outlined in this bulletin to fulfill the Bearing Clearance Test inspection requirements to determine next required ... Read More »
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TSB #21-EM-003H
This bulletin provides the inspection procedure and repair guidelines for certain vehicles listed below. Read More »
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TSB #23-HC-002H
This bulletin provides information related to the Engine Control Module (ECM) software update and coolant replacement for 2020-2023MY Sonata Hybrid (DN8 HEV) vehicles to improve the coolant filling mode by discharging air bubbles. Read More »
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TSB #23-01-093H
This bulletin provides the procedure to update the Hybrid Control Unit (HCU) and Dual Automatic Temperature Control (DATC) software to help improve coolant flow to the Exhaust Heat Recovery System (EHRS). Read More »
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TSB #23-EM-009H
Certain 2020-2023MY Sonata Hybrid (DN8 HEV) vehicles may exhibit coolant leakage, engine overheating, and white smoke from the exhaust due to an internal leak at the Exhaust Heat Recovery System (EHRS) portion of the center muffler ... Read More »
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TSB #23-AT-006H-2
This TSB provides information to diagnose the push button shifter operation. Read More »
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TSB #23-HC-002H
This bulletin provides information related to the Engine Control Module (ECM) software update and coolant replacement for 2020-2023MY Sonata Hybrid (DN8 HEV) vehicles to improve the coolant filling mode by discharging air bubbles. Read More »
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TSB #23-AT-006H-1
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 »
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TSB #22-AT-010H
If you are servicing an applicable vehicle with a a??Check Enginea?? light on and one or more of the DTC listed below, follow the Service Procedure and replace the valve body internal harness and the input/output speed sensor. Read More »
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TSB #22-AT-001H
This TSB provides a procedure to diagnose the push button shifter operation. If you are servicing a vehicle with any symptoms or DTC listed below, follow the Service Procedure, Page 2. Read More »
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TSB #21-AT-009H
This TSB provides a procedure to diagnose the push button shifter operation. Read More »
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TSB #21-AT-007H
If you are servicing an 8-speed front-wheel-drive vehicle with the DTC or symptoms listed below, refer to the Service Procedure to diagnose the condition. Read More »
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TSB #21-01-040H
This bulletin describes the procedure to update the Shift Control Unit (SCU) for Shift-by-Wire vehicles (SBW). The update improves the display in the cluster. Read More »
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TSB #23-AT-006H-1
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 »
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TSB #24-BE-001H
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 »
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TSB #23-01-093H
This bulletin provides the procedure to update the Hybrid Control Unit (HCU) and Dual Automatic Temperature Control (DATC) software to help improve coolant flow to the Exhaust Heat Recovery System (EHRS). Read More »
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TSB #23-BE-007H
This Service Information bulletin provides information on how to update the Apple Carplay software from Hyundaia??s Navigation Updates page. Read More »
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TSB #21-BE-002H
This bulletin describes the procedure to update the radio software to help reduce the disconnection occurrences. Read More »
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TSB #21-01-007H
When using Wireless CarPlay, the system may intermittently auto disconnect. When Wireless CarPlay is disconnected, a pop up message a??Phone Not Responding. Please reconnect it and try againa?? will appear on the radio screen. Read More »
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TSB #24-BD-001H
This bulletin contains information about the proper removal of the windshield wiper blade protective cover on all models. Read More »
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TSB #23-BD-002H
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 »
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TSB #24-BD-001H
This bulletin contains information about the proper removal of the windshield wiper blade protective cover on all models. Read More »
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TSB #23-BD-007H
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 »
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TSB #22-GI-006H
Effective June 2, 2008, Federal Motor Vehicle Safety Standard 110 (FMVSS 110) established a threshold for correcting load carrying capacity information indicated on tire placards when vehicle weight has been increased before retail ... Read More »
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TSB #21-EM-004H
This bulletin provides the service procedure for engine connecting rod bearing clearance testing. Perform the procedure outlined in this bulletin to fulfill the Bearing Clearance Test inspection requirements to determine next required ... Read More »
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TSB #21-BR-002H
This bulletin provides best practice recommendations when performing brake service procedures. Read More »
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TSB #21-EM-003H
This bulletin provides the inspection procedure and repair guidelines for certain vehicles listed below. Read More »
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TSB #23-BE-007H
This Service Information bulletin provides information on how to update the Apple Carplay software from Hyundaia??s Navigation Updates page. Read More »
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TSB #Certain vehicles
If you are servicing an applicable vehicle with a a??Check Enginea?? light on and one or more of the DTC listed below, follow the Service Procedure and replace the harness with an integrated oil temperature sensor. Read More »
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TSB #21-BE-002H
This bulletin describes the procedure to update the radio software to help reduce the disconnection occurrences. Read More »
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TSB #21-BR-002H
This bulletin provides best practice recommendations when performing brake service procedures. Read More »