Ford Bronco 2021 — technical service bulletin
Bulletin TSB 21-2251 · NHTSA communication 10200737 · issued Aug 2, 2021
Technical service bulletin
communication type
Electrical System
component
2021
model years
1
vehicle entries
Official summary
Some 2021 Bronco vehicles built on or before 09-Jul-2021 may exhibit an intermittent No Key Detected message displayed in the instrument cluster followed by a double horn chirp immediately after starting the vehicle. This may be due to a software parameter in the driver door module (DDM) and/or the passenger door module (PDM). To correct the condition, follow the Service Procedure to reprogram the DDM and PDM.
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.