{"vehicle":{"id":"2011_kia_optima","year":2011,"make":"Kia","model":"Optima"},"code":"P1744","generic":false,"description":null,"bulletins":{"as_of":"2026-10-19","count":2,"bulletins":[{"nhtsa_id":10144235,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-09-10","date":"2018-08-13","document_id":"TSBTRA068_CLOSED","mfr_campaign":null,"component":"ELECTRICAL SYSTEM; POWER TRAIN","summary":"TSB: HCU/TCU LOGIC IMPROVEMENT FOR DTC P1744 (400 MESH EQUIPPED TRANSMISSIONS ONLY) - TSB TRA068 CLOSED. REFER TO TSB TRA079/SA351","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2018/MC-10144235-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2018/MC-10144235-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10144235"},{"nhtsa_id":10123331,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-11-14","date":"2017-10-12","document_id":"TSBTRA068","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"TSB - HCU/TCU LOGIC IMPROVEMENT FOR DTC P1744 (400 MESH EQUIPPED TRANSMISSIONS ONLY) - This bulletin provides the procedure to improve the logic of the Hybrid Control Unit (HCU) on some 2011-2012MY Optima Hybrid (TF HEV), produced from February 15, 2011 through December 28, 2012, and both the Hybrid Control Unit (HCU) and the Transmission Control Unit (TCU) on some 2013-2015MY Optima Hybrid (TF HEV) vehicles, produced from January 15, 2013 through March 27, 2015, which may experience a malfunction indicator lamp illumination with DTC P1744. To correct this concern, apply the improved logic to the HCU only (11-12MY) or HCU and TCU (13-15MY) using the KDS ECU Upgrade function as described in this bulletin. For confirmation that the latest reflash has been applied to a vehicle you are working on, verify the ROM ID using the table on page 3 of this bulletin.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10123331-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10123331-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10123331"}],"url":"https://open.wenmarpro.com/makes/kia/optima/2011/bulletins?code=P1744"},"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/2011/codes/P1744","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."]}