{"vehicle":{"id":"2014_kia_optima","year":2014,"make":"Kia","model":"Optima"},"code":"P0171","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":2,"bulletins":[{"nhtsa_id":10109774,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-08-02","date":"2016-11-15","document_id":"TSB-ENG160R1","mfr_campaign":null,"component":"ELECTRICAL SYSTEM:SOFTWARE; ENGINE","summary":"TSB: ECU UPGRADE ? MIL ON WITH DTC(s) P0420/P0171 - This bulletin provides information related to the ECU software upgrade for some 2012~2015MY Optima (QF) vehicles, produced from August 12, 2011 to October 2, 2015, some 2012~2015MY Sorento (XMa) vehicles, produced from April 19, 2011 to December 11, 2014, some 2011~2015MY Optima (TF) vehicles, produced from August 12, 2010 to July 23, 2015, and some 2014~2016MY Sportage (SL) vehicles, produced from September 30, 2013 to November 16, 2015, which may experience a malfunction indicator lamp (MIL) illuminated with the Electronic Control Unit (ECU) system-related DTC(s): P0420 and possibly P0171. This concern occurs most commonly during prolonged engine braking while descending a steep grade.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10109774-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10109774-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10109774"},{"nhtsa_id":10109683,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-08-02","date":"2016-10-11","document_id":"TSB-ENG160","mfr_campaign":null,"component":"ELECTRICAL SYSTEM:SOFTWARE; ENGINE","summary":"TSB: ECU UPGRADE ? MIL ON WITH DTC(s) P0420/P0171 - This bulletin provides information related to the ECU software upgrade for some 2012~2015MY Optima (QF) vehicles, produced from August 12, 2011 to October 2, 2015, some 2012~2015MY Sorento (XMa) vehicles, produced from April 19, 2011 to December 11, 2014, some 2011~2015MY Optima (TF) vehicles, produced from August 12, 2010 to July 23, 2015, and some 2014~2016MY Sportage (SL) vehicles, produced from September 30, 2013 to November 16, 2015, which may experience a malfunction indicator lamp (MIL) illuminated with the Electronic Control Unit (ECU) system-related DTC(s): P0420 and possibly P0171. This concern occurs most commonly during prolonged engine braking while descending a steep grade.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10109683-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10109683-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10109683"}],"url":"https://open.wenmarpro.com/makes/kia/optima/2014/bulletins?code=P0171"},"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/2014/codes/P0171","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."]}