EV Diagnostics
Verified EV diagnostic knowledge page

Audi C12AF02

Replacing the control module for driver assistance systems (J1121) for th

DriveUnknown. Safe-to-drive status is not established by verified evidence.
ChargeUnknown. Safe-to-charge status is not established by verified evidence.
ServiceService need is unknown in the supplied diagnostic record. Because the verified source concerns driver-assistance control-module service information, professional diagnosis is appropriate.
Confidence95%

Quick answer

C12AF02 is listed in an official Audi/NHTSA manufacturer communication concerning the control module for driver assistance systems (J1121). The supplied evidence does not establish the full code description, vehicle symptoms, driving/charging safety, or a specific repair outcome.

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

Video guides

Watch Videos

Relevant videos play here without leaving this diagnostic page.

No sufficiently relevant embeddable video has been accepted for this diagnostic yet.

Videos are supporting material and never override OEM or regulator evidence.

1. What does C12AF02 mean?

C12AF02 is listed in an official Audi/NHTSA manufacturer communication concerning the control module for driver assistance systems (J1121). The supplied evidence does not establish the full code description, vehicle symptoms, driving/charging safety, or a specific repair outcome.

2. Technical explanation

The verified source lists C12AF02 alongside diagnostic entries for the overhead-view camera system. Its service-note excerpt refers to replacement of the control module for driver assistance systems (J1121), but the supplied excerpt is truncated and does not establish the complete condition, diagnostic procedure, or required repair.

3. What system is affected?

Driver assistance systems control module (J1121); the official communication also lists overhead-view camera-related diagnostic entries.

4. How serious is this code?

Unknown. Severity is not established by the supplied verified evidence.

5. Symptoms you may notice

  • Not yet established by verified evidence.

6. Possible causes

  • The official communication references the driver assistance systems control module (J1121). A specific cause for C12AF02 is not yet established by the supplied verified evidence.

7. Can I still drive the vehicle?

Unknown. Safe-to-drive status is not established by verified evidence.

8. Can I charge the vehicle?

Unknown. Safe-to-charge status is not established by verified evidence.

9. What you can safely do

  • Arrange diagnosis by an Audi-qualified service provider if C12AF02 is present.
  • Do not attempt high-voltage or control-module repairs based on this information.

10. Step-by-step troubleshooting

  1. Use an appropriate diagnostic tool to confirm the stored DTC and associated fault information.
  2. Have a qualified technician consult the applicable Audi service information and the referenced manufacturer communication.

11. When to contact service

Service need is unknown in the supplied diagnostic record. Because the verified source concerns driver-assistance control-module service information, professional diagnosis is appropriate.

12. What the service center may check

  • Confirm whether C12AF02 is current, intermittent, or stored history.
  • Check for accompanying DTCs, including the overhead-view camera entries listed in the official communication.
  • Review the applicable Audi manufacturer communication for the vehicle's exact configuration.

13. Possible repair or resolution

  • Not yet established by verified evidence. The source excerpt mentions replacement of control module J1121, but does not establish that replacement is the required resolution for every occurrence of C12AF02.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Audi manufacturer communication A9120172055188_3, published by NHTSA on October 15, 2020 (NHTSA manufacturer communication PDF 10181431). The supplied excerpt lists C12AF02 and contains a service note referring to replacement of the driver assistance systems control module (J1121).
  • The communication states that its technical background and production solution are "Not applicable."

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified official source: NHTSA Manufacturer Communication PDF 10181431, Audi communication A9120172055188_3: https://static.nhtsa.gov/odi/tsbs/2020/MC-10181431-0001.pdf

19. Frequently asked questions

Which vehicles are covered by the supplied applicability data?

Audi A7, A8, and e-tron vehicles for model years 2019 through 2022 in the US.

Does C12AF02 confirm that the J1121 module must be replaced?

No. The source excerpt references J1121 replacement, but it does not establish module replacement as the required repair for every C12AF02 occurrence.

Is it safe to drive or charge with C12AF02?

Not yet established by verified evidence.

20. Sources & verification

Verified
Audi C12AF02: Replacing the control module for driver assistance… | EV Diagnostics