Ford Mustang Mach E 2021–2022 — technical service bulletin
Bulletin SSM 51647 · NHTSA communication 10236584 · issued May 17, 2023
Technical service bulletin
communication type
Exterior Lighting
component
2021–2022
model years
2
vehicle entries
Official summary
Some 2021-2022 Mustang Mach-E vehicles may exhibit a condition of intermittent headlamp operation while the vehicle is OFF and have diagnostic trouble code (DTC) B1533 stored in the body control module (BCM). This may be due to the internal logic within the headlamp switch. Switch and/or module replacement will not resolve this condition. Headlamp operation is not affected while the vehicle is ON. A new headlamp switch is currently under development to correct this condition. This condition does not affect vehicle durability and no additional diagnosis or service is required for this condition
Vehicles covered
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.