Ford Expedition 2018–2022 — technical service bulletin
Bulletin SSM 51617 · NHTSA communication 10236332 · issued May 9, 2023
Technical service bulletin
communication type
Exterior Lighting
component
2018–2022
model years
5
vehicle entries
Official summary
Some 2018-2022 Expedition 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. To correct this condition, replace the headlamp switch (service base part number: 11654). Refer to Workshop Manual, Section 417-01.
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.