{"nhtsa_id":10221672,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-09-26","date":"2021-07-16","document_id":"2102421","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM; POWER TRAIN; EXTERIOR LIGHTING","mfr_system":null,"summary":"Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience one or both of the following conditions: A Malfunction Indicator Lamp (MIL) event or failure with no Diagnostic Trouble Codes (DTCs) and the vehicle has less than 644 km (400 miles) on the odometer indicates it is likely the vehicle has experienced an unintentional code clear event.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10221672-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10221672-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10221672","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"lighting","name":"Lighting","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"JEEP","model":"WRANGLER","year_from":2020,"year_to":2020,"match":"exact","vehicle_ids":["2020_jeep_wrangler"]}],"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":[]}