Technical Service Bulletins (TSBs) for the 2020 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.

    STEERING

    • TSB #21-ST-001H

      Date Announced:
      JAN 28, 2021
      NHTSA ID:
      #10186825

      The rack-mounted dual pinion Motor Driven Power Steering (MDPS) system components can be replaced separately from the complete assembly. Read More »

    • TSB #20-ST-003H-1

      Date Announced:
      SEP 09, 2020
      NHTSA ID:
      #10180985

      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 assembly. Read More »

    • TSB #20-ST-001H-2

      Date Announced:
      SEP 09, 2020
      NHTSA ID:
      #10180981

      This bulletin provides information regarding replacement of the column-mounted Motor Driven Power Steering (MDPS) system as separate components. Read More »

    • TSB #20-ST-001H

      Date Announced:
      JAN 03, 2020
      NHTSA ID:
      #10170896

      This bulletin provides information regarding replacement of the column-mounted Motor Driven Power Steering (MDPS) system as separate components. Read More »

    STEERING:COLUMN

    • TSB #20-ST-001H-1

      Date Announced:
      AUG 10, 2020
      NHTSA ID:
      #10179244

      This bulletin provides information regarding replacement of the column-mounted Motor Driven Power Steering (MDPS) system as separate components. Read More »

    • TSB #20-ST-003H

      Date Announced:
      AUG 10, 2020
      NHTSA ID:
      #10179246

      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 assembly. Read More »

    STEERING:ELECTRIC POWER ASSIST SYSTEM

    • TSB #20-ST-003H

      Date Announced:
      AUG 10, 2020
      NHTSA ID:
      #10179246

      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 assembly. Read More »

    STEERING:AUTOMATED/ADAPTIVE STEERING:MOTOR/ACTUATOR

    • TSB #20-ST-001H-1

      Date Announced:
      AUG 10, 2020
      NHTSA ID:
      #10179244

      This bulletin provides information regarding replacement of the column-mounted Motor Driven Power Steering (MDPS) system as separate components. Read More »

    SUSPENSION

    • TSB #20-SS-001H

      Date Announced:
      FEB 05, 2020
      NHTSA ID:
      #10172142

      This bulletin describes the requirements for all wheel alignment and/or vehicle tracking claims and best practices when diagnosing and conducting alignment-related repairs for all models and model years. Read More »

    BRAKES (PWS)

    • TSB #21-BR-002H

      Date Announced:
      MAR 23, 2021
      NHTSA ID:
      #10190038

      This bulletin provides best practice recommendations when performing brake service procedures. Read More »

    • TSB #20-BR-002H

      Date Announced:
      NOV 30, 2020
      NHTSA ID:
      #10183963

      This bulletin describes the procedure to inspect and identify fluid which may appear around the brake caliper area. Read More »

    • TSB #19-01-043H

      Date Announced:
      DEC 20, 2019
      NHTSA ID:
      #10170513

      This bulletin describes the procedure to inspect, and if necessary re-route the main harness adjacent to the brake booster of certain 2020MY Sonata (DN8) vehicles. Read More »

    • TSB #Campaign T4J Dea

      Date Announced:
      DEC 20, 2019
      NHTSA ID:
      #10170514

      Hyundai is conducting a Service Campaign to inspect, and if necessary, re-route the main harness adjacent to the brake booster of certain 2020MY Sonata (DN8) vehicles. Read More »

    SERVICE BRAKES, HYDRAULIC

    • TSB #20-FL-004H

      Date Announced:
      MAY 29, 2020
      NHTSA ID:
      #10176198

      This bulletin describes the Idle Stop and Go (ISG) system operation, diagnostic and battery sensor recalibration procedure. Refer to applicable Shop Manual and Owner⿿s Manual for additional information. Read More »

    ENGINE (PWS)

    • TSB #20-AT-006H

      Date Announced:
      FEB 12, 2020
      NHTSA ID:
      #10172211

      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 »

    ENGINE AND ENGINE COOLING

    • TSB #21-EM-004H

      Date Announced:
      MAR 30, 2021
      NHTSA ID:
      #10190044

      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 »

    • TSB #21-EM-003H

      Date Announced:
      MAR 10, 2021
      NHTSA ID:
      #10189989

      This bulletin provides the inspection procedure and repair guidelines for certain vehicles listed below. Read More »

    • TSB #21-01-009H

      Date Announced:
      FEB 11, 2021
      NHTSA ID:
      #10188246

      This bulletin provides information related to an Electronic Control Module (ECM) software update which revises detection logic for DTC P2422: EVAP System Restricted Vent Valve logic. Read More »

    • TSB #20-01-027H

      Date Announced:
      JUN 22, 2020
      NHTSA ID:
      #10177133

      This bulletin provides information related to an Electronic Control Module (ECM) software update to revise the logic for DTC P030X: Cylinder ⿿X⿝ Misfire Detected and P0456: EVAP System Leakage Detected ⿿ Very Small Leak. Read More »

    • TSB #Campaign T5A Dea

      Date Announced:
      JUN 22, 2020
      NHTSA ID:
      #10177134

      This service campaign information is related to an Electronic Control Module (ECM) software update to revise the logic for DTC P030X: Cylinder ⿿X⿝ Misfire Detected and P0456: EVAP System Leakage Detected ⿿ Very Small Leak. Read More »

    • TSB #20-FL-004H

      Date Announced:
      MAY 29, 2020
      NHTSA ID:
      #10176198

      This bulletin describes the Idle Stop and Go (ISG) system operation, diagnostic and battery sensor recalibration procedure. Refer to applicable Shop Manual and Owner⿿s Manual for additional information. Read More »

    • TSB #20-01-005H(1)

      Date Announced:
      FEB 11, 2020
      NHTSA ID:
      #10172145

      This bulletin provides information related to an Electronic Control Module (ECM) software update to revise the logic for DTC P0456: EVAP System Leakage Detected Very Small Leak. Read More »

    • TSB #Campaign T4N Dea

      Date Announced:
      FEB 11, 2020
      NHTSA ID:
      #10172146

      This service campaign provides information related to an ECM software update to revise the logic for DTC P0456: EVAP System Leakage Detected Very Small Leak. Read More »

    • TSB #20-AT-005H

      Date Announced:
      JAN 27, 2020
      NHTSA ID:
      #10170886

      If you are servicing an applicable vehicle with a Check Engine light on and one or more of the DTC listed below, follow the repair procedure and replace the related solenoid and oil pressure harness. Read More »

    • TSB #20-AT-004H

      Date Announced:
      JAN 27, 2020
      NHTSA ID:
      #10170887

      If you are servicing an applicable vehicle with a Check Engine light on and one or more of the DTC listed below, follow the repair procedure and replace the related oil pressure harness with integrated oil temperature sensor. Read More »

    • TSB #20-AT-003H

      Date Announced:
      JAN 27, 2020
      NHTSA ID:
      #10170889

      If you are servicing an applicable vehicle with a Check Engine light on and one or more of the DTC listed below, follow the repair procedure and replace the related input/output speed sensor and oil pressure harness. Read More »

    POWER TRAIN

    • TSB #20-AT-005H-1

      Date Announced:
      OCT 13, 2020
      NHTSA ID:
      #10182314

      If you are servicing an applicable vehicle with a ⿿Check Engine⿝ light on and one or more of the DTC listed below, follow the repair procedure and replace the related solenoid and valve body harness. Read More »

    • TSB #20-AT-020H

      Date Announced:
      SEP 02, 2020
      NHTSA ID:
      #10180977

      This bulletin provides a procedure to transfer pressure data to the TCU using GDS Mobile. This procedure is necessary to reduce the transmission learning time and improve the shift quality. Read More »

    • TSB #20-FL-004H

      Date Announced:
      MAY 29, 2020
      NHTSA ID:
      #10176198

      This bulletin describes the Idle Stop and Go (ISG) system operation, diagnostic and battery sensor recalibration procedure. Refer to applicable Shop Manual and Owner⿿s Manual for additional information. Read More »

    • TSB #20-AT-019H

      Date Announced:
      MAY 21, 2020
      NHTSA ID:
      #10176196

      If you are servicing any of the vehicles listed below with a harsh and/or delayed shift, use the GDS as shown in the Service Procedure to measure shift engagement time. Read More »

    • TSB #20-AT-016H

      Date Announced:
      APR 17, 2020
      NHTSA ID:
      #10174807

      The automatic transmission warranty repair policy authorizes in-dealership repairs of the following components for both OEM (new) and remanufactured automatic transmissions: Read More »

    • TSB #20-DS-001H(1)

      Date Announced:
      APR 09, 2020
      NHTSA ID:
      #10174802

      Certain 2020MY Sonata (DN8) vehicles may exhibit a grease leak coming from the right side, inner CV axle boot area. Read More »

    • TSB #20-AT-006H

      Date Announced:
      FEB 12, 2020
      NHTSA ID:
      #10172211

      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 »

    • TSB #20-AT-001H

      Date Announced:
      JAN 02, 2020
      NHTSA ID:
      #10170899

      This TSB provides a procedure to diagnose and repair a transaxle for the following Incorrect Ratio DTC (transaxle clutch slipping more than 200 rpm in gear). Read More »

    ELECTRICAL SYSTEM

    • TSB #21-BE-004H

      Date Announced:
      MAR 16, 2021
      NHTSA ID:
      #10189991

      When using Wireless CarPlay, the system may intermittently auto disconnect. When Wireless CarPlay is disconnected, a pop up message ⿿Phone Not Responding. Please reconnect it and try again⿝ will appear on the radio screen. Read More »

    • TSB #20-BE-014H

      Date Announced:
      DEC 21, 2020
      NHTSA ID:
      #10185443

      When using Wireless CarPlay, the system may intermittently auto disconnect. When Wireless CarPlay is disconnected, a pop up message ⿿Phone Not Responding. Please reconnect it and try again⿝ will appear on the radio screen. Read More »

    • TSB #20-01-039H

      Date Announced:
      OCT 09, 2020
      NHTSA ID:
      #10182304

      This bulletin provides information and procedures for collecting OBD ⿿In Use Monitor Performance Ratio⿝ (IUMPR) data on certain 2019-2021MY vehicles at California dealers. Read More »

    • TSB #20-ST-001H-1

      Date Announced:
      AUG 10, 2020
      NHTSA ID:
      #10179244

      This bulletin provides information regarding replacement of the column-mounted Motor Driven Power Steering (MDPS) system as separate components. Read More »

    • TSB #20-ST-003H

      Date Announced:
      AUG 10, 2020
      NHTSA ID:
      #10179246

      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 assembly. Read More »

    • TSB #20-EE-003H

      Date Announced:
      APR 23, 2020
      NHTSA ID:
      #10174808

      This bulletin provides information on identifying dealer stock vehicles with either: ⿢ A Battery SOC alert - low Battery State of Charge (SOC) at or below 50%. ⿢ A 30 Day alert - vehicle has not started and reported an SOC in 30 days. Read More »

    • TSB #20-EE-005H

      Date Announced:
      MAR 31, 2020
      NHTSA ID:
      #10173553

      Hyundai vehicles are equipped with Dark Current Control logic to help reduce amperage draw amount and conserve Battery State of Charge (SOC%). Read More »

    • TSB #20-EE-002H(1)

      Date Announced:
      MAR 18, 2020
      NHTSA ID:
      #10173545

      This bulletin describes the mandatory procedure to submit battery test data electronically for battery warranty claims by running the GDS Battery Claim App. Read More »

    • TSB #20-01-005H(1)

      Date Announced:
      FEB 11, 2020
      NHTSA ID:
      #10172145

      This bulletin provides information related to an Electronic Control Module (ECM) software update to revise the logic for DTC P0456: EVAP System Leakage Detected Very Small Leak. Read More »

    • TSB #Campaign T4N Dea

      Date Announced:
      FEB 11, 2020
      NHTSA ID:
      #10172146

      This service campaign provides information related to an ECM software update to revise the logic for DTC P0456: EVAP System Leakage Detected Very Small Leak. Read More »

    • TSB #20-BE-001H

      Date Announced:
      JAN 16, 2020
      NHTSA ID:
      #10170883

      This bulletin provides guidelines to inspect the USB, head unit, and multi-box for common connection conditions. 2. This bulletin presents guidelines to inspect for common Android Auto and Apple CarPlay connection conditions. 3. Read More »

    • TSB #Campaign T4L Dea

      Date Announced:
      JAN 02, 2020
      NHTSA ID:
      #10170897

      On certain Sonata (DN8) vehicles equipped with smart user features, the registered Hyundai app and the digital key card may not open the doors or start the vehicle when using these features. Read More »

    ELECTRICAL SYSTEM:SOFTWARE

    • TSB #20-01-027H

      Date Announced:
      JUN 22, 2020
      NHTSA ID:
      #10177133

      This bulletin provides information related to an Electronic Control Module (ECM) software update to revise the logic for DTC P030X: Cylinder ⿿X⿝ Misfire Detected and P0456: EVAP System Leakage Detected ⿿ Very Small Leak. Read More »

    • TSB #Campaign T5A Dea

      Date Announced:
      JUN 22, 2020
      NHTSA ID:
      #10177134

      This service campaign information is related to an Electronic Control Module (ECM) software update to revise the logic for DTC P030X: Cylinder ⿿X⿝ Misfire Detected and P0456: EVAP System Leakage Detected ⿿ Very Small Leak. Read More »

    EXTERIOR LIGHTING

    • TSB #20-BD-014H

      Date Announced:
      JUL 14, 2020
      NHTSA ID:
      #10178175

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

    VISIBILITY

    • TSB #20-BD-020H

      Date Announced:
      DEC 18, 2020
      NHTSA ID:
      #10185437

      This bulletin describes the procedure to replace the front door module assembly if the front door window cannot close or the door regulator cables are separated from the regulator track. Read More »

    • TSB #20-BD-013H-1

      Date Announced:
      NOV 20, 2020
      NHTSA ID:
      #10183962

      This bulletin describes the procedure to diagnose and repair a window exhibiting noise while lowering and raising. Read More »

    • TSB #20-HA-003H

      Date Announced:
      OCT 23, 2020
      NHTSA ID:
      #10182325

      Certain 2020MY Sonata vehicles (DN8A) may experience an inoperative air conditioning system with cold air not blowing from the vents. This condition may be caused by an electrical terminal connection in the engine room junction box. Read More »

    • TSB #20-BD-013H

      Date Announced:
      APR 13, 2020
      NHTSA ID:
      #10174805

      This bulletin describes the procedure to diagnose and repair a window exhibiting noise while lowering and raising. Read More »

    VISIBILITY:POWER WINDOW DEVICES AND CONTROLS

    • TSB #20-BD-013H-1

      Date Announced:
      NOV 20, 2020
      NHTSA ID:
      #10183962

      This bulletin describes the procedure to diagnose and repair a window exhibiting noise while lowering and raising. Read More »

    LATCHES/LOCKS/LINKAGES

    • TSB #20-BD-005H

      Date Announced:
      MAR 17, 2020
      NHTSA ID:
      #10173544

      This bulletin describes the procedure to repair an inside door handle exhibiting noise when opening the door. Read More »

    TIRES

    • TSB #20-SS-004H

      Date Announced:
      NOV 19, 2020
      NHTSA ID:
      #10183960

      This bulletin provides tire vibration service procedures, including how to optimize vehicle vibration performance. Read More »

    • TSB #20-SS-002H(1)

      Date Announced:
      MAY 06, 2020
      NHTSA ID:
      #10176182

      This bulletin provides information on tire maintenance best practices and procedures for dealers and customers to maximize tire life and performance. Read More »

    WHEELS

    • TSB #20-SS-004H

      Date Announced:
      NOV 19, 2020
      NHTSA ID:
      #10183960

      This bulletin provides tire vibration service procedures, including how to optimize vehicle vibration performance. Read More »

    • TSB #20-SS-002H(1)

      Date Announced:
      MAY 06, 2020
      NHTSA ID:
      #10176182

      This bulletin provides information on tire maintenance best practices and procedures for dealers and customers to maximize tire life and performance. Read More »

    EQUIPMENT

    • TSB #20-01-039H

      Date Announced:
      OCT 09, 2020
      NHTSA ID:
      #10182304

      This bulletin provides information and procedures for collecting OBD ⿿In Use Monitor Performance Ratio⿝ (IUMPR) data on certain 2019-2021MY vehicles at California dealers. Read More »

    • TSB #20-ST-003H-1

      Date Announced:
      SEP 09, 2020
      NHTSA ID:
      #10180985

      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 assembly. Read More »

    • TSB #20-ST-001H-2

      Date Announced:
      SEP 09, 2020
      NHTSA ID:
      #10180981

      This bulletin provides information regarding replacement of the column-mounted Motor Driven Power Steering (MDPS) system as separate components. Read More »

    • TSB #20-BD-014H

      Date Announced:
      JUL 14, 2020
      NHTSA ID:
      #10178175

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

    • TSB #20-01-027H

      Date Announced:
      JUN 22, 2020
      NHTSA ID:
      #10177133

      This bulletin provides information related to an Electronic Control Module (ECM) software update to revise the logic for DTC P030X: Cylinder ⿿X⿝ Misfire Detected and P0456: EVAP System Leakage Detected ⿿ Very Small Leak. Read More »

    • TSB #20-BD-007H-1

      Date Announced:
      MAY 01, 2020
      NHTSA ID:
      #10176178

      This bulletin describes the general guidelines to help disinfect and protect vehicle exterior/interior surfaces using recommended safe chemical products. Read More »

    • TSB #20-EE-003H

      Date Announced:
      APR 23, 2020
      NHTSA ID:
      #10174808

      This bulletin provides information on identifying dealer stock vehicles with either: ⿢ A Battery SOC alert - low Battery State of Charge (SOC) at or below 50%. ⿢ A 30 Day alert - vehicle has not started and reported an SOC in 30 days. Read More »

    • TSB #19-01-042H

      Date Announced:
      DEC 17, 2019
      NHTSA ID:
      #10170512

      This bulletin provides information and procedures for collecting OBD ?In Use Monitor Performance Ratio? (IUMPR) data on certain 2019-2020MY vehicles at California dealers. This reporting is mandated by CARB (California Air Resources Board). Read More »

    • TSB #19-GI-008H

      Date Announced:
      NOV 07, 2019
      NHTSA ID:
      #10169372

      This bulletin provides information on the Launch Quality Monitoring Process (LQMP) for the 2020MY Hyundai Sonata. After a new vehicle launch, Hyundai uses the LQMP to monitor all customer and dealer activities at a minimum of 100 days. Read More »

    EQUIPMENT:ELECTRICAL

    • TSB #20-01-001H

      Date Announced:
      JAN 02, 2020
      NHTSA ID:
      #10170900

      This bulletin describes the procedure to identify and retrieve the Unique Identification Numbers (UID) from the 20MY Sonata's Identity Authentication Unit (IAU) to enable Hyundai Digital Key. Read More »

    EQUIPMENT:MECHANICAL

    • TSB #20-DS-001H(1)

      Date Announced:
      APR 09, 2020
      NHTSA ID:
      #10174802

      Certain 2020MY Sonata (DN8) vehicles may exhibit a grease leak coming from the right side, inner CV axle boot area. Read More »

    EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

    • TSB #20-AT-016H

      Date Announced:
      APR 17, 2020
      NHTSA ID:
      #10174807

      The automatic transmission warranty repair policy authorizes in-dealership repairs of the following components for both OEM (new) and remanufactured automatic transmissions: Read More »

    EQUIPMENT ADAPTIVE/MOBILITY

    • TSB #20-ST-003H-1

      Date Announced:
      SEP 09, 2020
      NHTSA ID:
      #10180985

      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 assembly. Read More »

    • TSB #20-BD-014H

      Date Announced:
      JUL 14, 2020
      NHTSA ID:
      #10178175

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

    • TSB #20-AT-016H

      Date Announced:
      APR 17, 2020
      NHTSA ID:
      #10174807

      The automatic transmission warranty repair policy authorizes in-dealership repairs of the following components for both OEM (new) and remanufactured automatic transmissions: Read More »

    • TSB #20-DS-001H(1)

      Date Announced:
      APR 09, 2020
      NHTSA ID:
      #10174802

      Certain 2020MY Sonata (DN8) vehicles may exhibit a grease leak coming from the right side, inner CV axle boot area. Read More »

    • TSB #20-BD-007H

      Date Announced:
      MAR 23, 2020
      NHTSA ID:
      #10173546

      This bulletin describes the general guidelines to disinfect and protect vehicle interior surfaces using certain safe chemical products. Read More »