# 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.

- Type: Service bulletin
- NHTSA id: 11017347
- Published by NHTSA: 2025\-04\-30
- Manufacturer's number: SSM 53668
- Manufacturer's date: 2025\-04\-25
- NHTSA component: UNKNOWN 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11017347-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11017347-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Trouble codes named

B150C, B150D

## Vehicles listed

- 2025 FORD EXPEDITION
- 2025 LINCOLN NAVIGATOR

JSON: [/v1/bulletins/11017347](/v1/bulletins/11017347)

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