{"vehicle":{"id":"2020_hyundai_sonata","year":2020,"make":"Hyundai","model":"Sonata"},"code":"P0456","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":4,"bulletins":[{"nhtsa_id":10177134,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-07-08","date":"2020-06-22","document_id":"Campaign T5A Dea","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE","summary":"This service campaign information is related to an Electronic Control Module (ECM) software update to revise the logic for DTC P030X: Cylinder “X” Misfire Detected and P0456: EVAP System Leakage Detected – Very Small Leak. This Service Campaign T5A will replace Service Campaign T4N.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10177134-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10177134-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10177134"},{"nhtsa_id":10177133,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-07-08","date":"2020-06-22","document_id":"20-01-027H","mfr_campaign":null,"component":"ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT; ENGINE AND ENGINE COOLING","summary":"This bulletin provides information related to an Electronic Control Module (ECM) software update to revise the logic for DTC P030X: Cylinder “X” Misfire Detected and P0456: EVAP System Leakage Detected – Very Small Leak.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10177133-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10177133-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10177133"},{"nhtsa_id":10172146,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-03-06","date":"2020-02-11","document_id":"Campaign T4N Dea","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM","summary":"This service campaign provides information related to an ECM software update to revise the logic for DTC P0456: EVAP System Leakage Detected Very Small Leak.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10172146-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10172146-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10172146"},{"nhtsa_id":10172145,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-03-06","date":"2020-02-11","document_id":"20-01-005H(1)","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM","summary":"This bulletin provides information related to an Electronic Control Module (ECM) software update to revise the logic for DTC P0456: EVAP System Leakage Detected Very Small Leak.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10172145-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10172145-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10172145"}],"url":"https://open.wenmarpro.com/makes/hyundai/sonata/2020/bulletins?code=P0456"},"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/2020/codes/P0456","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."]}