Service campaign 25-01-010H TSB
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service campaign |
|---|---|
| NHTSA id | 11014285 |
| Published by NHTSA | 2025-02-17 |
| Manufacturer's number | 25-01-010H TSB |
| Manufacturer's date | 2025-02-11 |
| Campaign id or software version | 9B4 |
| NHTSA component | FUEL/PROPULSION SYSTEM |
NHTSA's summary
This bulletin provides the procedure to update the software for the Battery Management System (BMS) on certain Elantra Hybrid (CN7 HEV), Sonata Hybrid (DN8 HEV), and Tucson Hybrid (NX4 HEV) vehicles that may exhibit a warning light with DTC P1BB20.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Fuel system
| HYUNDAI ELANTRA HYBRID | 2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it) |
|---|---|
| HYUNDAI SONATA HYBRID | 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it) |
| HYUNDAI TUCSON HYBRID | 2022 (the catalog's model; the bulletin names a series or trim of it) |
| HYUNDAI TUCSON HYBRID | 2024 (the catalog's model; the bulletin names a series or trim of it) |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 2025637 | 2025-11-18. Fuel System |
|---|---|
| 25V796000 | 2025-11-17. FUEL SYSTEM, GASOLINE |
| 2024403 | 2024-07-11. Fuel System |
| 2021426 | 2021-07-09. Fuel System |
| 21V524000 | 2021-07-09. FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS |
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
| 26-FL-001H TSB | 2026-01-13. Service bulletin. Some vehicles equipped with a 2.5L GDI Theta III engine (non-Turbo) may exhibit one or more misfire DTCs due to the GDI fuel injectors leaking internally. This may be caused by internal filter breakage in the injector. Follow the procedure in this TSB to replace all 4 injectors on affected vehicles, using the kit in the Parts Information section. |
|---|---|
| 25-FL-003H | 2025-06-03. Service bulletin. Certain Elantra (CN7), Elantra N (CN7 N), Elantra (CN7A) vehicles may experience a thudding noise coming from the fuel tank assembly at idle or on an incline when the PCSV (Purge Control Solenoid Valve) is operating, and fuel level is above 90% full. If the noise is heard, follow the service procedure to replace the fuel tank assembly and resolve the concern. |
| 25-01-010H DN | 2025-02-17. Service bulletin. Certain Elantra hybrid (CN7 HEV), Sonata hybrid (DN8 HEV), and Tucson hybrid (NX4 HEV) vehicles may exhibit a warning 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. |
| 25-FL-001H | 2025-01-13. Service bulletin. Some vehicles equipped with a 2.5L GDI Theta III engine (non-Turbo) may exhibit one or more misfire DTCs due to the GDI injectors leaking internally. This may be caused by internal filter breakage in the injector. Follow the procedure in this TSB to replace all 4 injectors on affected vehicles, using the kit in the Parts Information section. |
| 25-01-001H TSB | 2025-01-06. Service campaign. Certain 2021-2023MY Sonata (DN8) and 2020-2022MY Sonata (DN8A) vehicles may have DTC P0451 stored in the ECU. Follow this bulletin to inspect the check valve, fuel pump cover and fuel tank, and update the ECU. If necessary, replace the check valve and/or fuel tank based on inspection results. The ECU Upgrade contains a revised DTC P14EE00 which supersedes P0451. |
| 25-01-001H DBP | 2025-01-06. Service campaign. Certain 2021-2023MY Sonata (DN8) and 2020-2022MY Sonata (DN8A) vehicles may have Diagnostic Trouble Code (DTC) P0451 (also known as DTC P14EE00) stored in the Electronic Control Unit (ECU). The California Air Resources Board has determined that these vehicles may be releasing air pollutants which exceed Federal and California standards. |
| 24-01-020H DBP | 2024-12-03. Service campaign. Certain 2021-2023MY Sonata (DN8) and 2020-2022MY Sonata (DN8A) vehicles may have Diagnostic Trouble Code (DTC) P0451 stored in the Electronic Control Unit (ECU). The California Air Resources Board has determined that these vehicles may be releasing air pollutants which exceed Federal and California standards. |
| 24-01-020H TSB | 2024-12-03. Service campaign. Certain 2021-2023MY Sonata (DN8) and 2020-2022MY Sonata (DN8A) vehicles may have DTC P0451 stored in the ECU. Follow this bulletin to inspect the check valve, fuel pump cover and fuel tank, and update the ECU. If necessary, replace the check valve and/or fuel tank based on inspection results. |
| 24-01-049H | 2024-08-07. Service campaign. Certain 2024MY Tucson Hybrid (NX4 HEV) vehicles may exhibit poor contact or wire breakage of the injector wiring harness. This affects a very limited lot number of the wiring harness production. The California Air Resources Board has determined that these vehicles may be releasing air pollutants which exceed Federal and California standards. |
| 24-01-049H | 2024-08-07. Service bulletin. Certain 2024MY Tucson Hybrid (NX4 HEV) vehicles may exhibit poor contact or wire breakage of the injector wiring harness. This affects a limited lot number of the wiring harness production. Follow the procedures in this bulletin to inspect the lot number for the affected parts and, if applicable, replace the injector wiring harness with a new part. |