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.
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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
2Original wording in English
LINCOLN
Some 2025-2026 Nautilus vehicles with heated-only front seats (minor feature code BY1AC) (not heated and cooled) may set diagnostic trouble codes (DTCs) B103A:15, B1034:13, B1036:13, and B1038:15 in the heating, ventilation, and air conditioning (HVAC) module when a diagnostic self-test is performed. These DTCs have no effect on…
LINCOLN
Some 2025 Nautilus vehicles with heated-only front seats (minor feature code BY1AC) may set diagnostic trouble codes (DTCs) B103A:15, B1034:13, B1036:13, and B1038:15 in the heating, ventilation, and air conditioning (HVAC) module when a diagnostic self-test is performed
Check vehicle applicability
3A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Lincoln | NAUTILUS ↗ | 2026 |
| Lincoln | NAUTILUS ↗ | 2025 |
| Lincoln | NAUTILUS ↗ | 2024 |
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.