{"nhtsa_id":10185430,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-01-09","date":"2020-12-15","document_id":"20-01-047H","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Certain 20MY Elantra (AD/ADa) vehicles may experience an illuminated check engine warning light due to Diagnostic Trouble Codes (DTC) listed below. Perform the Transmission Control Unit (TCU) update, and, if necessary, replace the IVT (Intelligent Variable Transmission) to resolve this condition.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10185430-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10185430-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10185430","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HYUNDAI","model":"ELANTRA","year_from":2020,"year_to":2020,"match":"exact","vehicle_ids":["2020_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":[]}