{"vehicle":{"id":"2021_cadillac_ct4","year":2021,"make":"Cadillac","model":"CT4"},"code":"P31D4","generic":false,"description":null,"bulletins":{"as_of":"2026-10-19","count":3,"bulletins":[{"nhtsa_id":11011711,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-12-10","date":"2024-11-08","document_id":"21-NA-130","mfr_campaign":null,"component":"ENGINE","summary":"This service bulletin provides a repair procedure to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated, DTC P31E8, P31DB, P31D4 and/or P31E2 Set.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11011711-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11011711-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11011711"},{"nhtsa_id":10199283,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-07-19","date":"2021-05-28","document_id":"21NA130","mfr_campaign":null,"component":"EXTERIOR LIGHTING","summary":"This service bulletin provides a repair procedure to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated, DTC P31E8, P31DB, P31D4 and/or P31E2 Set.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10199283-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10199283-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10199283"},{"nhtsa_id":10198892,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-07-06","date":"2021-05-28","document_id":"21NA130","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING","summary":"This service bulletin provides a repair procedure to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated, DTC P31E8, P31DB, P31D4 and/or P31E2 Set.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10198892-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10198892-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10198892"}],"url":"https://open.wenmarpro.com/makes/cadillac/ct4/2021/bulletins?code=P31D4"},"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/cadillac/ct4/2021/codes/P31D4","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."]}