{"nhtsa_id":10109865,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-08-02","date":"2017-05-24","document_id":"TSBENG168","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM; SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES","mfr_system":null,"summary":"TSB: COMBINATION TSB/SERVICE ACTION: IDLE STABILITY & SHIFT QUALITY IMPROVEMENT (SA294) - This bulletin provides the procedure to improve the logic of the Electronic Control Unit (ECU) and the Transmission Control Unit (TCU) on some 2016MY Optima (JFa) vehicles, produced from September 3, 2015 through November 22, 2016, which may experience a vibration and/or hesitation when releasing the brake pedal after coming to stop, and/or a shift quality concern, such as a harsh downshift, upshift, and/or shift delay. To correct this concern, apply the improved logic to the ECU and TCU using KDS download as described in this bulletin.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10109865-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10109865-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10109865","components":[{"id":"brakes","name":"Brakes","parent":null},{"id":"electrical","name":"Electrical system","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"},{"id":"transmission-control-module","name":"Transmission control module","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"KIA","model":"OPTIMA","year_from":2016,"year_to":2016,"match":"exact","vehicle_ids":["2016_kia_optima"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}