{"nhtsa_id":10203653,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-12-01","date":"2021-11-17","document_id":"TSB 21-2405","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","mfr_system":null,"summary":"Some 2021 Mustang Mach-E vehicles built on or before 09-Sep-2021 may exhibit an illuminated powertrain malfunction indicator (wrench) lamp and/or display the message Shift System Fault Service required with DTC U0103:87 stored in the secondary on board diagnostic module (SOBDMC). Some vehicles may also exhibit DTCs U0100:00, U0121, U0140, and/or U0155 stored in the gear shift module (GSM). This may be due to the software in the GSM. To correct the condition, follow the Service Procedure to reprogram the GSM.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10203653-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10203653-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10203653","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null},{"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":["U0100","U0103","U0121","U0140","U0155"],"topics":[],"vehicles":[{"make":"FORD","model":"MUSTANG MACH E","year_from":2021,"year_to":2021,"match":"exact","vehicle_ids":["2021_ford_mustang-mach-e"]}],"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":[]}