2020 Hyundai Sonata Hybrid TSBs

a warning lamp for DTC P218100 (Cooling System Performance) related to the Integrated Thermal-Management Module (ITM). Follow the service procedure in this bulletin to install a spring onto the thermostat within the ITM, in order to prevent premature opening, and perform an ECU software update on affected vehicles.

combination lamp, daytime running lamp (DRL), or fog lamp. This TSB illustrates the various causes of condensation inside the lamp assembly. Lamp assembly replacement is NOT necessary in most cases. This condition can be eliminated by turning on the lamps with the engine running for several minutes or during normal driving operation.

from the exhaust due to an internal leak at the Exhaust Heat Recovery System (EHRS) portion of the center muffler assembly. Follow the procedure outlined in this bulletin to repair this condition after confirming EHRS is leaking internally.

for 2020-2023MY Sonata Hybrid (DN8 HEV) vehicles to improve the coolant filling mode by discharging air bubbles.

combination lamp, daytime running lamp (DRL), or fog lamp. This TSB illustrates the various causes of condensation inside the lamp assembly. Lamp assembly replacement is NOT necessary in most cases. This condition can be eliminated by turning on the lamps with the engine running for several minutes or during normal driving operation.

the Service Procedure and replace the valve body internal harness and the input/output speed sensor.

load carrying capacity information indicated on tire placards when vehicle weight has been increased before retail sale. This limit is the lesser of 1.5% of GVWR or 100 pounds. If the total added weight exceeds the lesser of the limit, a label must be added to the driver-side B-pillar within 25mm (1 inch) of the original tire placard.

system accordingly during engine short block or sub-assembly replacement.

the Service Procedure and replace the related solenoid and harness.

If bearing noise is heard, follow the procedure in this bulletin to replace the worm shaft bearing.

If bearing noise is heard, follow the procedure in this bulletin to replace the worm shaft bearing.

If bearing noise is heard, follow the procedure in this bulletin to replace the worm shaft bearing.

the Service Procedure and replace the harness with an integrated oil temperature sensor.

If bearing noise is heard, follow the procedure in this bulletin to replace the worm shaft bearing

Perform the procedure outlined in this bulletin to fulfill the Bearing Clearance Test inspection requirements to determine next required steps.

check engine light ON with a DTC P17A0 (Navigation Control Module). This bulletin describes the procedure to install an Audio Video Navigation (AVN) software update to address the condition stated above.

If bearing noise is heard, follow the procedure in this bulletin to replace the worm shaft assembly.

as separate components.

If bearing noise is heard, follow the procedure in this bulletin to replace the worm shaft assembly.

as separate components.

combination lamp, daytime running lamp (DRL), or fog lamp. The TSB illustrates the various causes of condensation inside the lamp assembly. Lamp assembly replacement is NOT necessary in most cases. This condition can be eliminated by turning on the lamps with the engine running for several minutes, or during normal driving operation.

The changes may vary depending on vehicle type, model, and navigation system as described in this TSB.

The changes may vary depending on vehicle type, model, and navigation system. Refer to the 2024 2nd Navigation Map and Software Update Improvements section in this TSB for a list of specific changes. The software can be downloaded via Navigation Updater (NAU) and updated by USB. The NAU website is https://update.hyundai.com/US/EN/navigationUpdate. For certain models equipped with a relevant Bluelink package, the software may be downloaded and applied via OTA update.

when entering radio mode and/or displays a message that reads Uneven Road Ahead, Drive carefully on the cluster along with a warning sound. Follow the procedure outlined in this bulletin to update the AVN software to resolve this condition.

when entering radio mode and/or displays a message that reads Uneven Road Ahead, Drive carefully on the cluster along with a warning sound. Follow the procedure outlined in this bulletin to update the AVN software to resolve this condition.

When Wireless CarPlay is disconnected, a pop up message Phone Not Responding. Please reconnect it and try again will appear on the radio screen.

When Wireless CarPlay is disconnected, a pop up message Phone Not Responding. Please reconnect it and try again will appear on the radio screen. This bulletin describes the procedure to update the radio software to help reduce the disconnection occurrences.

When Wireless CarPlay is disconnected, a pop up message Phone Not Responding. Please reconnect it and try again will appear on the radio screen.

voltage condition.

light due to DTC Code P1BB20 (12V Lithium Battery Cell Voltage High). The California Air Resources Board has determined that these vehicles may be releasing air pollutants which exceed Federal and California standards.

Hybrid (CN7 HEV), Sonata Hybrid (DN8 HEV), and Tucson Hybrid (NX4 HEV) vehicles that may exhibit a warning light with DTC P1BB200 and enter Limp Mode.

light due to DTC Code P1BB20 (12V Lithium Battery Cell Voltage High). Follow the procedure in TSB 25-01-010H (or latest version) to perform the update the Battery management System (BMS) software.

Hybrid (CN7 HEV), Sonata Hybrid (DN8 HEV), and Tucson Hybrid (NX4 HEV) vehicles that may exhibit a warning light with DTC P1BB20.

light due to DTC Code P1BB20 (12V Lithium Battery Cell Voltage High). Follow the procedure in TSB 24-01-054H (or latest version) to perform the update the Battery management System (BMS) software.

Hybrid (CN7 HEV), Sonata Hybrid (DN8 HEV), and Tucson Hybrid (NX4 HEV) vehicles that may exhibit a warning light with DTC P1BB20.

(transmission clutch slip in gear above limit) listed on Page 2.

If you are servicing a vehicle with any symptoms listed below or DTCs (listed on Page 2) , follow the Service Procedure on Page 3. SYMPTOMS: Shifter System Malfunction displayed in the cluster Wont shift into or out of gear or wont shift out of Park Incorrect gear display in cluster and/or wont start

The current version of Google Maps has 10 times the data transmission compared to the previous version. As a countermeasure, an update with a frame skip logic has been added to resolve the data congestion with Google Maps.

If you are servicing a vehicle with any symptoms or DTC listed below, follow the Service Procedure, Page 2.

This may be due to an irregular disconnection on Verizons communication network. Follow the procedure in this TSB to reestablish the connection via the AVN pinhole reset method.

This may be due to an irregular disconnection on Verizon's communication network. If you are experiencing issues with remote commands, or other Bluelink services, please see the instructions below to reestablish the connection via the AVN pinhole reset method.

This may be due to an irregular disconnection on Verizons communication network. Follow the procedure in this TSB to reestablish the connection via the AVN pinhole reset method.

(DATC) software to help improve coolant flow to the Exhaust Heat Recovery System (EHRS).

(DATC) software to help improve coolant flow to the Exhaust Heat Recovery System (EHRS).

certain 2019-2021MY vehicles at California dealers. This reporting is mandated by CARB (California Air Resources Board).

previously.

If the protective cover is not removed correctly, there is a possibility of the rubber insert and rail spring becoming partially separated on the inner side of the wiper blade, which could lead to poor wiping performance and/or possible scratching of the windshield glass. Follow the procedure in this bulletin to properly remove the windshield wiper blade protective cover on all new wiper blades.

It provides a barrier between the paint and contaminants, such as rail dust, acid rain, and industrial fallout. In rare cases, the paint can become clouded under the PPF. These spots are the result of moisture trapped between the PPF and the paint.

For all wheel/tire balance claims, the Tire Balance Data Sheet must be fully completed including imbalance and Road Force Variation (RFV) data. The Data Sheet can be found at the end of this bulletin.

After a new vehicle launch, Hyundai uses the LQMP to monitor all customer and dealer activities at a minimum of 100 days. The Sonata Hybrid LQMP helps improve model vehicle quality, and allows Hyundai to proactively respond to the Voice of the Customer (VOC).