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Audi U101400

up can cause the telematics control module to erroneously enter this DTC. Production Solution Not applicable. Page 2 of 2 © 2020 Audi of America, Inc. All rights reserved. Informat

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact an Audi dealer or qualified Audi service provider if the code is accompanied by customer concerns or other diagnostic faults. The verified communication specifically addresses U101400 in J949; it does not establish guidance for unrelated faults or symptoms.
Confidence95%

Quick answer

For the listed Audi vehicles, U101400 may be stored in telematics control module J949 (address word 0075) because of a start-up timing issue. Audi’s communication states that no repair is available and repairs should not be performed for this concern.

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 U101400 mean?

For the listed Audi vehicles, U101400 may be stored in telematics control module J949 (address word 0075) because of a start-up timing issue. Audi’s communication states that no repair is available and repairs should not be performed for this concern.

2. Technical explanation

Audi identifies U101400 as “Control module incorrectly coded” when stored in telematics control module J949, address word 0075. The verified technical background is a timing issue during start-up that can cause the module to enter the DTC erroneously. The evidence does not establish an actual incorrect-coding condition in this scenario.

3. What system is affected?

Telematics control module J949, address word 0075.

4. How serious is this code?

Not yet established by verified evidence. Audi states that this DTC does not have an impact, but the supplied excerpt does not specify the affected vehicle functions.

5. Symptoms you may notice

  • Earlier versions of the Audi communication state that there may be no customer concerns and that the DTC may be found during pre-delivery inspection or other diagnostic work.
  • No other symptoms are established by verified evidence.

6. Possible causes

  • A timing issue during start-up can cause telematics control module J949 to erroneously enter U101400.
  • Other causes are not yet established by verified evidence.

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

  • Have the code and the control-module address verified by an Audi-qualified service provider.
  • Provide the service provider with the applicable Audi manufacturer communication and the stored-code details.
  • Do not authorize repairs solely for this concern based on the cited Audi communication.

10. Step-by-step troubleshooting

  1. Confirm that U101400 is stored in telematics control module J949 at address word 0075.
  2. Review the applicable Audi manufacturer communication for the vehicle and model year.
  3. Audi states that no repair is available at this time and instructs technicians not to perform repairs for this concern.

11. When to contact service

Contact an Audi dealer or qualified Audi service provider if the code is accompanied by customer concerns or other diagnostic faults. The verified communication specifically addresses U101400 in J949; it does not establish guidance for unrelated faults or symptoms.

12. What the service center may check

  • Verify DTC U101400 in telematics control module J949, address word 0075.
  • Check whether the vehicle falls within the listed Audi model-year applicability.
  • Review whether other DTCs or customer concerns are present; their meaning is not established by this communication.

13. Possible repair or resolution

  • Audi’s manufacturer communication states: no repair is available at this time.
  • Audi instructs technicians not to perform any repairs for this concern; it states that repairs may be denied.
  • No production solution is listed as applicable.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Audi manufacturer communication A9122102057715_4, published through NHTSA on July 12, 2022: applies to specified 2019–2020 US Audi A8, Q5, and e-tron vehicles; identifies the start-up timing issue and states that no repair is available.
  • Earlier revisions include A9120752057715_3, published June 5, 2020, and A9120612057715_2, published April 28, 2020.

16. Recall information

  • No recall information was supplied or established by verified evidence.

17. Official manufacturer information

Official NHTSA-hosted Audi manufacturer communication: https://static.nhtsa.gov/odi/tsbs/2022/MC-10215786-0001.pdf

19. Frequently asked questions

What does U101400 mean in this Audi communication?

It is listed as “Control module incorrectly coded” when stored in telematics control module J949, address word 0075.

What causes this U101400 entry?

Audi states that a timing issue on start-up can cause the telematics control module to enter the DTC erroneously.

Does Audi specify a repair?

No. Audi states that no repair is available at this time and instructs technicians not to perform repairs for this concern.

Which vehicles are covered by the supplied evidence?

The supplied applicability data lists US-market 2019–2020 Audi A8, Q5, and e-tron vehicles.

Can I drive or charge the vehicle?

Not yet established by verified evidence.

20. Sources & verification

Verified
Audi U101400: up can cause the telematics control module to… | EV Diagnostics