C103D on the 2025 Cadillac Optiq
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| PIC6603A | 2026-01-29. Service bulletin. This Preliminary information communicates to the technician the direction needed to address a Service headlamp message with DTC C103D sym28. |
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| PIC6603 | 2025-05-05. Service bulletin. This Preliminary information communicates to the technician the direction needed to address a Service headlamp message with DTC C103D sym28. |
2 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.