{"nhtsa_id":10171919,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-03-02","date":"2020-02-11","document_id":"11-199-20","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"This bulletin announces availability of reprogramming files to optimize the Engine Control Module (ECM). The new logic will address isolated concerns of a hard start condition occurring in cold weather (+10 degrees Fahrenheit or lower) and / or high-altitude areas. When this scenario occurs, the A/F learning control values move toward lean.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10171919-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10171919-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10171919","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"SUBARU","model":"FORESTER","year_from":2014,"year_to":2018,"match":"exact","vehicle_ids":["2014_subaru_forester","2015_subaru_forester","2016_subaru_forester","2017_subaru_forester","2018_subaru_forester"]},{"make":"SUBARU","model":"WRX","year_from":2015,"year_to":2020,"match":"exact","vehicle_ids":["2015_subaru_wrx","2016_subaru_wrx","2017_subaru_wrx","2018_subaru_wrx","2019_subaru_wrx","2020_subaru_wrx"]}],"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":[]}