{"nhtsa_id":10089620,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-01-26","date":"2015-07-31","document_id":"PS422","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"PITSTOP: ABS HECU REPLACEMENT DUE TO HESITATION CONCERNS - WHEN ADDRESSING CUSTOMER CONCERNS REGARDING HESITATION FROM THE VEHICLE ON HARD ACCELERATION, TEST DRIVE THE VEHICLE TO VERIFY THE CONCERN. PRIOR TO TEST DRIVING THE VEHICLE, ELIMINATE COMMON ELECTRONIC STABILITY CONTROL (ESC) TRIGGER FACTORS SUCH AS EXCESSIVE OR UNEVENLY WORN TIRES AND SLIPPERY ROAD CONDITIONS. IF DURING HARD ACCELERATION TESTING THE ESC LIGHT ILLUMINATES ON THE DASH AND ABNORMAL HESITATION IS EXPERIENCED, REPLACE THE ABS HYDRAULIC ELECTRONIC CONTROL UNIT (HECU) WITH A MODULE CONTAINING THE LATEST S/W VERSION. NOTE: ALWAYS VERIFY LATEST APPLICABLE P/N INFORMATION USING EPC.","document":null,"url":"https://open.wenmarpro.com/bulletins/10089620","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"KIA","model":"OPTIMA","year_from":2012,"year_to":2013,"match":"exact","vehicle_ids":["2012_kia_optima","2013_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":[]}