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.
Manufacturer communications
24Original wording in English
AUDI
Reported code forms C12B3FA
This bulletin provides information when there is an Audi adaptive light system malfunction; DTC C12B3FA is stored in the control module for driver assistance systems.
PORSCHE
Reported code forms C12B3F3
Symptom based workshop manual for Information Messages Regarding Assistance System Failures, Fault Memory Entry: Implausible Chassis Number “C12B3F3” in the Assistance Systems Control Unit
AUDI
Reported code forms C12B3FA
This bulletin provides information when the Audi adaptive light system malfunctions; DTC C12B3FA is stored in the control module.
AUDI
Reported code forms C12B3FD
This bulletin provides information when high beam assist, or traffic sign detection limited, DTC C12B3FD may be stored in the DAS control module.
AUDI
Reported code forms C12B3FA
This bulletin provides informaton when there is an adaptive light system malfunction; DTC C12B3FA stored in the control module for driver assistance systems.
AUDI
Reported code forms C12B3FA
This bulletin provides information when various Driver assist systems are unavailable; DTC C12B3FA, C12D5FA.
Check vehicle applicability
212A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Audi | A3 | 2020 |
| Audi | A3 | 2019 |
| Audi | A3 | 2018 |
| Audi | A3 | 2017 |
| Audi | A3 | 2016 |
| Audi | A6 | 2025 |
| Audi | A6 | 2024 |
| Audi | A6 | 2023 |
| Audi | A6 | 2022 |
| Audi | A6 | 2021 |
| Audi | A6 | 2020 |
| Audi | A6 | 2019 |
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.
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.