2021 Hyundai Sonata technical service bulletins
92 technical service bulletins and manufacturer communications cover the 2021 Hyundai Sonata.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- This bulletin provides information related to the navigation and head unit software changes introduced in...
- Some Hyundai vehicles may be equipped with a parking distance warning (PDW) sensor(s) that may trigger...
- Higher-than-expected engine oil consumption
- Higher-than-expected engine oil consumption
- This bulletin provides information related to a Transmission Control Unit (TCU) software update for some...
- Difficulty starting in cold weather
- The federal safety agency has issued an urgent safety advisory regarding dangerous, counterfeit...
- The federal safety agency has identified the presence of substandard and dangerous driver’s-side airbag...
- Some Santa Cruz (NXT), Santa Fe (TMA, MX5A), and Sonata (DN8A) models may require replacement of the...
- Certain warning lights and trigger DTC C272246 fault code for the front camera
- DTCs P218100, P2181F0, and/or P2181F1 (Cooling System Performance) set in the Engine Control Module,...
- One or more misfire DTCs due to the GDI fuel injectors leaking internally
- This bulletin provides information regarding condensation related to the accumulated moisture in the...
- This bulletin provides information related to the changes introduced in the 2025 1st Navigation Map and...
- One of the DTCs listed below, related to the high pressure electric oil pump (HP EOP). Follow the...
- This bulletin provides information related to the changes introduced in the 2024 2nd Navigation Map and...
- Loss of connectivity or interruptions in the middle of using Bluelink Service functions
- Issues with the air conditioning due to damaged wiring in the engine room junction box
- Loss of connectivity or interruptions in the middle of using Bluelink Service functions
- One or more misfire DTCs due to the GDI injectors leaking internally
- Diagnostic Trouble Code (DTC) P0451 (also known as DTC P14EE00) stored in the Electronic Control Unit...
- DTC P0451 stored in the ECU. Follow
- The subject vehicles may have Diagnostic Trouble Code (DTC) P0451 stored in the ECU, which could
- DTC P0451 stored in the ECU. Follow
- Diagnostic Trouble Code (DTC) P0451 stored in the Electronic Control Unit (ECU). The California Air...
- Warning lamp illumination for a diagnostic trouble code P2181 that is related to the Integrated Thermal...
- Condition where the radio app crashes frequently when entering radio mode and/or displays a message that...
- This TSB provides a procedure to diagnose and replace, if necessary, an automatic transmission with...
- This bulletin provides the procedure to update the Engine Control Module (ECM) and/or the Transmission...
- This bulletin provides the procedure for updating the automatic transmission TCU and ECU software (Santa...
- This bulletin contains information about the proper removal of the windshield wiper blade protective cover...
- Condition where the radio app crashes frequently when entering radio mode and/or displays a message that...
- This TSB provides information to diagnose the push button shifter operation.
- This bulletin provides important checkpoint guidelines when performing engine oil and filter change services.
- This bulletin is issued to provide the extended battery diagnosis procedure using GDS-M. This battery...
- If you are servicing an 8-speed front-wheel-drive vehicle equipped with automatic transaxle with one or...
- This bulletin provides information related to a Transmission Control Unit (TCU) software update for...
- This bulletin outlines changes to the service procedure regarding the replacement of 8-speed wet dual...
- If you are servicing an 8-speed vehicle with a “Check Engine” light on and one or more of the DTC listed,...
- This bulletin provides warranty procedure for EGR Valve replacement related to DTC P0401 EGR Flow...
- This TSB provides information to diagnose the push button shifter operation
- If you are servicing an 8-speed DCT front-wheel-drive vehicle with the DTC or symptoms listed below, refer...
- This Service Information bulletin provides information on how to update the Apple Carplay software from...
- If you are servicing an 8-speed front-wheel-drive vehicle equipped with automatic transaxle with one or...
- This bulletin provides the diagnostic procedure for the GDI injector(s) in certain 21-23MY Sonata, 21-22MY...
- This bulletin provides service procedures to prevent possible moisture intrusion of the HP EOP (High Flow...
- This TSB applies only if Recall 236 or Service Campaign T8N has been performed and the 8 speed wet dual...
- Hyundai applies a Paint Protection Film (PPF) on new vehicles before delivery to dealerships
- This bulletin provides the procedure to repair poor pin tension at joint connector JE202 in certain Sonata...
- This bulletin provides the procedure to repair poor pin tension at joint connector JE102 in certain Sonata...
- This bulletin provides the diagnostic procedure for the GDI injector(s) in certain 21-23MY Sonata, 21-22MY...
- Some 2021 ~ 2022MY Sonata (DN8/DN8a) vehicles with N-Line trim may not engage Forward Collision Avoidance...
- This bulletin outlines changes to the service manual regarding the replacement of 8-speed dual clutch...
- This bulletin provides the diagnostic procedure for the GDI injector(s) in certain 21-22MY Sonata, Santa...
- This bulletin provides the procedure to update the TCU software to improve drivability and shift quality.
- Follow the guidelines outlined in
- If you are servicing an applicable vehicle with a “Check Engine” light on and one or more of the DTC...
- Effective June 2, 2008, Federal Motor Vehicle Safety Standard 110 (FMVSS 110) established a threshold for...
- Bearing noise within the Motor Driven Power Steering (MDPS) column worm shaft assembly
- If you are servicing an applicable vehicle with a “Check Engine” light on and one or more of the DTC...
- Bearing noise within the Motor Driven Power Steering (MDPS) column worm shaft assembly
- Automatic transmission fluid (ATF) leak at the rear cover
- MIL with DTC(s): • P2074: Mass Airflow Sensor Plausibility • P2074F0: Manifold Absolute Pressure/Mass Air Flow
- This TSB provides a procedure to diagnose the push button shifter operation
- Misassembled check valve for the PCV (Positive Crankcase Ventilation) system, resulting in engine oil...
- MIL with DTC(s): • P2074: Mass Airflow Sensor Plausibility • P2074F0: Manifold Absolute Pressure/Mass Air Flow
- Check engine light in conjunction with a popping noise, abnormal smell from the engine compartment, rough...
- Uneven appearance between LH and RH exhaust tips due to slightly misaligned rear mufflers
- : Certain vehicles equipped with 8-speed automatic transmission may experience an automatic transmission...
- Bearing noise within the Motor Driven Power Steering (MDPS) column worm shaft assembly
- This TSB provides a procedure to diagnose the push button shifter operation.
- This bulletin provides information related to an Electronic Control Module (ECM) software update which...
- If you are servicing an 8-speed front-wheel-drive vehicle with the DTC or symptoms listed below, refer to...
- This bulletin provides the service procedure for engine connecting rod bearing clearance testing
- This bulletin provides best practice recommendations when performing brake service procedures.
- This bulletin provides the inspection procedure and repair guidelines for certain vehicles listed below.
- This bulletin describes the procedure to update the radio software to help reduce the disconnection...
- The rack-mounted dual pinion Motor Driven Power Steering (MDPS) system components can be replaced...
- When using Wireless CarPlay, the system may intermittently auto disconnect
- This bulletin provides information on the Launch Quality Monitoring Process (LQMP) for the 2021MY Hyundai...
- When using Wireless CarPlay, the system may intermittently auto disconnect
- This bulletin describes the procedure to replace the front door module assembly if the front door window...
- This bulletin describes the procedure to identify and program certain Sonata vehicles Rear Corner Radars...
- This bulletin describes the procedure to inspect and identify fluid which may appear around the brake...
- This bulletin provides tire vibration service procedures, including how to optimize vehicle vibration...
- This bulletin provides a procedure to transfer pressure data to the TCU using GDS Mobile
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