B0226
Headlamp Auto-Leveling Front Sensor
The body control module reports an implausible signal from the front ride-height sensor used by the automatic headlamp leveling system. Without valid input, the headlamp pitch cannot be corrected for vehicle load.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: medium
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Common causes
Ordered by how often each turns out to be the cause.
- Front ride height sensor failedCommon
- Sensor linkage broken or detachedPossible
Parts involved
- Front Ride Height Sensor
- Headlamp Leveling Module
- Body Control Module
B0226 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.