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Service bulletin SSM 53668

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11017347
Published by NHTSA2025-04-30
Manufacturer's numberSSM 53668
Manufacturer's date2025-04-25
NHTSA componentUNKNOWN OR OTHER

NHTSA's summary

Some 2025 Expedition/Navigator vehicles may exhibit diagnostic trouble codes (DTCs) B150D:55 and/or B150C:55 stored in the audio control module (ACM) when a diagnostic self-test is performed. If no other symptoms, DTCs, or issues are identified, no further action is required. Replacement and/or reprogramming of the ACM will not resolve this condition.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Trouble codes named

B150C, B150D

Vehicles listed
FORD EXPEDITION2025
LINCOLN NAVIGATOR2025

Listing a model year does not mean every vehicle of it is concerned: the document says which.