Ford Mustang Mach E 2023–2025 — technical service bulletin
Bulletin SSM 54334 · NHTSA communication 11024894 · issued Oct 28, 2025
Technical service bulletin
communication type
Fuel/propulsion System
component
2023–2025
model years
3
vehicle entries
Official summary
Some 2023-2025 Mustang Mach-E vehicles equipped with a lithium iron phosphate (LFP) standard range battery (minor feature code HTHAH) built on or after 23-Jun-2023 may exhibit a condition where the displayed high voltage (HV) battery state of charge (SOC) percentage has a sudden reduction greater than 10% while driving. At low SOC, this may also result in a reduction of vehicle power with a turtle light displayed in the cluster. This concern may occur if the vehicle has not been charged to 100% for an extended period of time as this leads to an inaccurate displayed SOC. Advise customers to cha
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.