{"nhtsa_id":10196551,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-06-10","date":"2021-05-27","document_id":"21-01-043H","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"This bulletin provides information related to the Engine Control Module (ECM) software update for 2021MY Elantra (CN7/CN7A) vehicles equipped with the 2.0L engine to update the ECM logic for the following conditions and DTCs: • Incorrect learning of the fuel adaptive values can occur if the engine is started at 14⁰F (-10⁰C) or colder ambient temperatures. If incorrect values are learned, the engine may stall when coming to a stop or at idle. DTC P016C: Closed Loop Air/Fuel Ratio Control at Limit-System Too Lean may be detected. The ECM software revises the logic for fuel adaptation learning and improves engine performance at idle. • The ECM software also revises the blower motor control duty cycle logic for DTC P1CD0: Air Blower Motor Inverter Performance.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10196551-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10196551-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10196551","components":[{"id":"engine","name":"Engine","parent":null}],"codes":["P016C","P1CD0"],"topics":[],"vehicles":[{"make":"HYUNDAI","model":"ELANTRA","year_from":2021,"year_to":2021,"match":"exact","vehicle_ids":["2021_hyundai_elantra"]}],"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":[]}