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Audi C12B3FB

 ODIS Tester.  SVM code.  Software update package on SD Card if required (see Required Parts and Tools or download the software from MirrorServer using the SD Creator Program)

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService support is appropriate because the documented resolution path requires ODIS, an SVM code, and potentially an SD-card software update package.
Confidence95%

Quick answer

For certain 2019–2020 Audi A8 and e-tron vehicles in the US, DTC C12B3FB is documented in Audi PSS/TSB 2059889 in connection with an Audi adaptive light or adaptive driving assistant malfunction. The verified service information identifies an ODIS-guided software update procedure requiring an SVM code and, if required, an SD-card software package.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

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1. What does C12B3FB mean?

For certain 2019–2020 Audi A8 and e-tron vehicles in the US, DTC C12B3FB is documented in Audi PSS/TSB 2059889 in connection with an Audi adaptive light or adaptive driving assistant malfunction. The verified service information identifies an ODIS-guided software update procedure requiring an SVM code and, if required, an SD-card software package.

2. Technical explanation

The supplied official NHTSA manufacturer communications repeatedly reference PSS/TSB 2059889: “Audi adaptive light or adaptive driving assistant malfunction, DTC C12B3FB or B200FF3 stored in the driver assist.” The supplied evidence does not provide a component-level definition of C12B3FB. It does document a software-update service path using an ODIS tester, SVM code, and, when required, a software update package on an SD card. The stated total update time is approximately 60–120 minutes, including approximately 50–110 minutes for the software update.

3. What system is affected?

Driver assist; the verified bulletin reference also describes an Audi adaptive light or adaptive driving assistant malfunction.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • Audi adaptive light malfunction may be present.
  • Adaptive driving assistant malfunction may be present.
  • The DTC may be stored in the driver assist system.

6. Possible causes

  • A component-level cause is not yet established by verified evidence.
  • The documented service path includes a software update, but the supplied evidence does not establish a specific root cause.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Not yet established by verified evidence.

9. What you can safely do

  • Arrange diagnosis with an Audi service provider or suitably equipped service facility.
  • Provide the stored code C12B3FB and ask the service facility to check applicability of PSS/TSB 2059889.
  • Do not attempt software programming without the specified service equipment and procedure.

10. Step-by-step troubleshooting

  1. Verify that C12B3FB is stored in the driver assist system.
  2. Check applicability of PSS/TSB 2059889 for the vehicle.
  3. Use the documented ODIS/SVM-guided service process where applicable.

11. When to contact service

Service support is appropriate because the documented resolution path requires ODIS, an SVM code, and potentially an SD-card software update package.

12. What the service center may check

  • Confirm vehicle applicability and the stored DTC in the driver assist system.
  • Review PSS/TSB 2059889 for the adaptive light or adaptive driving assistant malfunction condition.
  • Use an ODIS tester and SVM code as specified by the bulletin.
  • Use the required SD-card software update package if required by the service procedure.

13. Possible repair or resolution

  • The verified bulletin material documents a software-update service path.
  • The update is stated to take approximately 60–120 minutes total, including approximately 50–110 minutes for the software update.

14. Affected vehicles

15. Related TSBs / service bulletins

  • PSS/TSB 2059889: Audi adaptive light or adaptive driving assistant malfunction; DTC C12B3FB or B200FF3 stored in driver assist. Referenced in NHTSA manufacturer communications 10198164, 10207161, 10210578, and 10231071.
  • Official source: https://static.nhtsa.gov/odi/tsbs/2023/MC-10231071-0001.pdf

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified NHTSA manufacturer communications list this condition for certain US-market 2019–2020 Audi A8 and e-tron vehicles. Source: https://static.nhtsa.gov/odi/tsbs/2023/MC-10231071-0001.pdf

19. Frequently asked questions

What does C12B3FB mean on an Audi?

The supplied verified evidence does not provide a component-level definition. It associates C12B3FB in the driver assist system with an Audi adaptive light or adaptive driving assistant malfunction under PSS/TSB 2059889.

Is there a documented fix?

The verified service information documents an ODIS-guided software update process requiring an SVM code and, if required, an SD-card software package.

Which vehicles are listed in the supplied applicability data?

US-market Audi A8 model years 2019–2020 and Audi e-tron model years 2019–2020 are listed. Exact vehicle applicability should be confirmed by the service facility.

Can I continue driving or charging?

Not yet established by verified evidence.

20. Sources & verification

Verified
Audi C12B3FB:  ODIS Tester.  SVM code.  Software update package on… | EV Diagnostics