Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer communications
3Original wording in English
CADILLAC
This Preliminary information communicates to the technician the direction needed to address a Service headlamp message with DTC C103D sym28.
CADILLAC
This Preliminary information communicates to the technician the direction needed to address a Service headlamp message with DTC C103D sym28.
BUICK
This preliminary information discusses that Customer will see Service Headlamp message on DIC. Adaptive Forward Lighting (AFL) will set DTC C103D.11 sending it into failsafe state. Technician should reprogram AFL module to repair concern.
Check vehicle applicability
2A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Buick | ENVISION ↗ | 2021 |
| Cadillac | OPTIQ ↗ | 2025 |
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.