{"nhtsa_id":10121892,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-11-03","date":"2016-11-30","document_id":"21-014-16 REV. A","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","mfr_system":null,"summary":"Flash: Transmission Diagnostic And Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. Some customers may experience one of the following: A less than desirable upshift in the transmission. Unwanted activation of second gear start while in winter mode.The following software enhancement is included in this update: Disable winter mode second gear launch (improve low traction launch).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10121892-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10121892-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10121892","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"},{"id":"transmission-control-module","name":"Transmission control module","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"JEEP","model":"CHEROKEE","year_from":2016,"year_to":2016,"match":"exact","vehicle_ids":["2016_jeep_cherokee"]}],"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":[]}