Ford F-150 2021–2023 — technical service bulletin
Bulletin SSM 52466 · NHTSA communication 10254132 · issued Apr 23, 2024
Technical service bulletin
communication type
Trailer Hitches
component
2021–2023
model years
3
vehicle entries
Official summary
Some 2021-2023 F-150 vehicles may exhibit DTCs B1D08 And/Or B1D09 stored in the trailer module (TRM) with a Trailer Brake System Fault See Manual message in the instrument panel cluster (IPC) when a trailer is not connected to the vehicle. This may be due to water intrusion at the back side of the trailer tow connector. Disconnect connector C4099 from the back of the trailer tow connector (14489). Inspect connector C4099 and the mating socket on the back of the trailer tow connector for signs of corrosion or damage. If corrosion or damage is present at either connector, replace both the female
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.