{"vehicle":{"id":"2018_kia_optima","year":2018,"make":"Kia","model":"Optima"},"code":"P1B77","generic":false,"description":null,"bulletins":{"as_of":"2026-10-19","count":2,"bulletins":[{"nhtsa_id":10230492,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-02-02","date":"2023-01-18","document_id":"TSB_ELE192_R1","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"TECHNICAL SERVICE BULLETIN: SERVICE ACTION: BMS/OPU/MCU LOGIC IMPROVEMENT (SA411) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides the procedure to improve the logic of the Battery Management System (BMS), Oil Pump Control Unit (OPU) and Motor Control Unit (MCU) on some 2017-2019MY Optima (JF P/HEV) vehicles, produced from August 25, 2016 through September 13, 2018 (refer to page 8) in order to improve the BMS diagnosis logic, OPU judgment logic for DTC P1B77 (High Voltage Battery Pre-Charging fault) and MCU communication logic.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10230492-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10230492-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10230492"},{"nhtsa_id":10174515,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-05-05","date":"2020-04-02","document_id":"TSB_ELE192","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"TECHNICAL SERVICE BULLETIN: SERVICE ACTION: BMS/OPU/MCU LOGIC IMPROVEMENT (SA411) - This bulletin provides the procedure to improve the logic of the Battery Management System (BMS), Oil Pump Control Unit (OPU) and Motor Control Unit (MCU) on some 2017-2019MY Optima (JF P/HEV) vehicles, produced from August 25, 2016 through September 13, 2018 (refer to page 8) in order to improve the BMS diagnosis logic, OPU judgment logic for DTC P1B77 (High Voltage Battery Pre-Charging fault) and MCU communication logic.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10174515-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10174515-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10174515"}],"url":"https://open.wenmarpro.com/makes/kia/optima/2018/bulletins?code=P1B77"},"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/kia/optima/2018/codes/P1B77","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."]}