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Audi U122800

Driver door control unit implausible

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService is appropriate because Audi’s documented remedy background is a software update. Whether service is immediately required is not yet established by verified evidence.
Confidence95%

Quick answer

For a 2019–2020 US Audi e-tron, DTC U122800 means “Driver door control unit implausible.” Audi service communications identify a software update as the technical background for this condition.

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 U122800 mean?

For a 2019–2020 US Audi e-tron, DTC U122800 means “Driver door control unit implausible.” Audi service communications identify a software update as the technical background for this condition.

2. Technical explanation

Audi identifies U122800 as “Driver door control unit implausible.” The code may be stored in the ABS control module J104 (address word 0003). The related communications also describe door-module faults that may be stored in one or more door control modules J386–J389. Audi’s stated technical background is that the software needs to be updated.

3. What system is affected?

Driver door control unit communication/logic, with U122800 documented as stored in the ABS control module J104 (address word 0003).

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • A stored U122800 diagnostic trouble code. Additional driver-visible symptoms are not yet established by verified evidence.

6. Possible causes

  • Audi’s verified technical background states that the software needs to be updated.

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 qualified repair facility.
  • Record any warning messages and the conditions present when the code was found.
  • Do not attempt high-voltage repairs based on this code.

10. Step-by-step troubleshooting

  1. Confirm U122800 with a compatible diagnostic scan tool.
  2. Determine whether the code is stored in ABS control module J104, address word 0003.
  3. Check Audi service information for the applicable software update.

11. When to contact service

Service is appropriate because Audi’s documented remedy background is a software update. Whether service is immediately required is not yet established by verified evidence.

12. What the service center may check

  • Scan the ABS control module J104 (address word 0003) for U122800.
  • Check door control modules J386–J389 (address words 0042, 0052, 00BB, and/or 00BC) for the related door-module DTCs cited by Audi.
  • Verify and apply the applicable Audi software update according to Audi service procedures.

13. Possible repair or resolution

  • Audi’s service communication states that the software needs to be updated. The exact update procedure and repair outcome are not otherwise established by the supplied verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Audi manufacturer communication A5720692055933_3, published June 17, 2020, NHTSA document MC-10176752-0001: identifies U122800 in ABS control module J104 and related door-module codes.
  • Audi manufacturer communication A5719612055933_2, published November 25, 2019, NHTSA document MC-10168644-0001: identifies U122800 in ABS control module J104 and states that the software needs to be updated.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified NHTSA-hosted Audi manufacturer communications: https://static.nhtsa.gov/odi/tsbs/2020/MC-10176752-0001.pdf and https://static.nhtsa.gov/odi/tsbs/2019/MC-10168644-0001.pdf

19. Frequently asked questions

What does Audi code U122800 mean?

It means “Driver door control unit implausible.”

Which vehicles are supported by the supplied evidence?

Audi e-tron vehicles for model years 2019–2020 in the US.

What does Audi identify as the technical background?

Audi states that the software needs to be updated.

Is it safe to drive or charge with U122800?

Not yet established by verified evidence.

20. Sources & verification

Verified
Audi U122800: Driver door control unit implausible | EV Diagnostics