{"vehicle":{"id":"2021_hyundai_sonata","year":2021,"make":"Hyundai","model":"Sonata"},"code":"P0451","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":5,"bulletins":[{"nhtsa_id":11012362,"type":"service_campaign","type_name":"Service campaign","date_added":"2025-01-06","date":"2025-01-03","document_id":"25-01-001H TSB","mfr_campaign":"25-01-001H","component":"FUEL/PROPULSION SYSTEM","summary":"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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11012362-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11012362-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11012362"},{"nhtsa_id":11012361,"type":"service_campaign","type_name":"Service campaign","date_added":"2025-01-06","date":"2025-01-03","document_id":"25-01-001H DBP","mfr_campaign":"25-01-001H","component":"FUEL/PROPULSION SYSTEM","summary":"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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11012361-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11012361-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11012361"},{"nhtsa_id":11011830,"type":"service_campaign","type_name":"Service campaign","date_added":"2024-12-13","date":"2024-12-10","document_id":"9B1 OL","mfr_campaign":"9B1","component":"ELECTRICAL SYSTEM","summary":"The subject vehicles may have Diagnostic Trouble Code (DTC) P0451 stored in the ECU, which could cause the Check Engine Lamp to come on.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11011830-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11011830-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11011830"},{"nhtsa_id":11010975,"type":"service_campaign","type_name":"Service campaign","date_added":"2024-12-03","date":"2024-11-14","document_id":"24-01-020H DBP","mfr_campaign":"9B1","component":"FUEL/PROPULSION SYSTEM","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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11010975-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11010975-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11010975"},{"nhtsa_id":11010974,"type":"service_campaign","type_name":"Service campaign","date_added":"2024-12-03","date":"2024-11-14","document_id":"24-01-020H TSB","mfr_campaign":"9B1","component":"FUEL/PROPULSION SYSTEM","summary":"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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11010974-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11010974-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11010974"}],"url":"https://open.wenmarpro.com/makes/hyundai/sonata/2021/bulletins?code=P0451"},"related":{"components":[],"bulletins":[],"recalls":{"may_apply":true,"recalls":[],"lookup":{"nhtsa":"https://www.nhtsa.gov/recalls","tc":"https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng","maker":null}}},"url":"https://open.wenmarpro.com/makes/hyundai/sonata/2021/codes/P0451","note":"The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.","attribution":["Contains information licensed under the Open Government Licence – Canada."]}