# Service campaign 24\-01\-020H DBP

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: 11010975
- Published by NHTSA: 2024\-12\-03
- Manufacturer's number: 24\-01\-020H DBP
- Manufacturer's date: 2024\-11\-14
- Campaign id or software version: 9B1
- NHTSA component: FUEL/PROPULSION SYSTEM

## NHTSA's summary

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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11010975-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11010975-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Fuel system

## Trouble codes named

P0451

## Vehicles listed

- 2020 to 2023 HYUNDAI SONATA

## Recalls for the same vehicles and component

- [2025637](/recalls/tc/2025637.md), 2025-11-18: Fuel System
- [25V796000](/recalls/nhtsa/25V796000.md), 2025-11-17: FUEL SYSTEM, GASOLINE
- [2021426](/recalls/tc/2021426.md), 2021-07-09: Fuel System
- [21V524000](/recalls/nhtsa/21V524000.md), 2021-07-09: FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS

## Other bulletins for the same vehicles and component

- [26\-FL\-001H TSB](/bulletins/11027589.md), 2026-01-13, Service bulletin: FUEL/PROPULSION SYSTEM. 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\-01\-010H DN](/bulletins/11014286.md), 2025-02-17, Service bulletin: FUEL/PROPULSION SYSTEM. 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\-01\-010H TSB](/bulletins/11014285.md), 2025-02-17, Service campaign: FUEL/PROPULSION SYSTEM. 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.
- [25\-FL\-001H](/bulletins/11012819.md), 2025-01-13, Service bulletin: FUEL/PROPULSION SYSTEM. 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](/bulletins/11012362.md), 2025-01-06, Service campaign: FUEL/PROPULSION SYSTEM. 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](/bulletins/11012361.md), 2025-01-06, Service campaign: FUEL/PROPULSION SYSTEM. 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 TSB](/bulletins/11010974.md), 2024-12-03, Service campaign: FUEL/PROPULSION SYSTEM. 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.
- [22\-01\-083H](/bulletins/10227321.md), 2022-12-07, Service bulletin: FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY; ELECTRICAL SYSTEM:SOFTWARE. This bulletin describes the procedure to verify, and if applicable perform an Integrated Electronic Booster \(IEB\) software update on certain 2022\-2023MY Sonata Hybrid \(DN8 HEV\) vehicles. This software updates the DTC monitoring logic for C240201 Motor Electrical.

JSON: [/v1/bulletins/11010975](/v1/bulletins/11010975)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20campaign%2024-01-020H%20DBP&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11010975&vehicle=Service%20campaign%2024-01-020H%20DBP)