{"vehicle":{"id":"2025_honda_accord","year":2025,"make":"Honda","model":"Accord"},"code":"P0300","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":6,"bulletins":[{"nhtsa_id":11037691,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-10-01","date":"2026-09-25","document_id":"A26-007","mfr_campaign":null,"component":"ENGINE","summary":"Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, and/or misfire. In some cases, DTCs P0300 through P0304 may also be stored (DTCs are not required for repair).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11037691-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11037691-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11037691"},{"nhtsa_id":11037689,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-10-01","date":"2026-09-25","document_id":"A26-005","mfr_campaign":null,"component":"ENGINE","summary":"Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, and/or misfire. In some cases, DTCs P0300 through P0304 may also be stored (DTCs are not required for repair).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11037689-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11037689-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11037689"},{"nhtsa_id":11036424,"type":"other","type_name":"Other","date_added":"2026-08-27","date":"2026-08-26","document_id":"AEBM08262026901","mfr_campaign":null,"component":"ENGINE","summary":"Dealer Message - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, misfire, and/or DTCs P0300 through P0304 stored.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11036424-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11036424-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11036424"},{"nhtsa_id":11036406,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-08-27","date":"2026-08-26","document_id":"A26-007","mfr_campaign":null,"component":"ENGINE","summary":"Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, misfire and/or DTCs P0300 thru P0304 stored.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11036406-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11036406-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11036406"},{"nhtsa_id":11036404,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-08-27","date":"2026-08-26","document_id":"A26-005","mfr_campaign":null,"component":"ENGINE","summary":"Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, misfire and/or DTCs P0300 thru P0304 stored.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11036404-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11036404-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11036404"},{"nhtsa_id":11020826,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-07-23","date":"2025-07-08","document_id":"A25-044","mfr_campaign":null,"component":"ENGINE","summary":"Service Bulletin - The engine runs rough and makes a rattling noise, accompanied by DTC P0134 or P0135 due to a possible fuel injector leak causing a rich air/fuel (A/F) mixture that fouls the spark plug(s) and causing the PCM to misread the A/F sensor heater resistance. Other DTCs may also include: P0700, P0300, P219C, P219D, P219E, P219F, P0172.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11020826-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11020826-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11020826"}],"url":"https://open.wenmarpro.com/makes/honda/accord/2025/bulletins?code=P0300"},"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/honda/accord/2025/codes/P0300","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."]}