Service campaign C7122
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 campaign |
|---|---|
| NHTSA id | 11020219 |
| Published by NHTSA | 2025-07-07 |
| Manufacturer's number | C7122 |
| Manufacturer's date | 2025-06-05 |
| Campaign id or software version | C7122 |
| NHTSA component | ENGINE |
NHTSA's summary
This Warranty Field Campaign is being issued to address a potential concern relating the FC3386 (Specific Humidity Sensor - Data Erratic, Intermittent, or Incorrect) on certain MY2021, L9N CM2380 L142B engines. This Campaign authorizes certified service locations to recalibrate the engine's control module (ECM).
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.
Components
Engine
| CUMMINS L9N |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.