# Service bulletin SSM 53578

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: 11016918
- Published by NHTSA: 2025\-04\-09
- Manufacturer's number: SSM 53578
- Manufacturer's date: 2025\-04\-05
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

Some 2025 Expedition/Navigator vehicles may exhibit diagnostic trouble code \(DTC\) P0929:71 in the gear shift module \(GSM\) when a diagnostic self\-test is performed. This may be due to the software within the GSM.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11016918-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11016918-9999.pdf)

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

## Trouble codes named

P0929

## Vehicles listed

- 2025 FORD EXPEDITION
- 2025 LINCOLN NAVIGATOR

JSON: [/v1/bulletins/11016918](/v1/bulletins/11016918)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20SSM%2053578&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11016918&vehicle=Service%20bulletin%20SSM%2053578)