EV Diagnostics
Verified EV diagnostic knowledge page

Audi B122B13

 DTC B122D29 (Lock unit for central locking Implausible signal).  DTC B14FF29 (Child safety lock motor Implausible signal).  DTC B122B13 (Central locking motors Open circuit). T

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService need is not yet established by verified evidence. If diagnosis or repair is desired, contact an Audi-qualified service provider.
Confidence95%

Quick answer

Audi DTC B122B13 is identified in the verified manufacturer communications as “Central locking motors Open circuit.”

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 B122B13 mean?

Audi DTC B122B13 is identified in the verified manufacturer communications as “Central locking motors Open circuit.”

2. Technical explanation

Verified Audi technical-bulletin evidence lists B122B13 for the front and rear passenger-side door control modules, including J927 (address word 00BC) for the rear passenger-side door. The supplied evidence describes an open-circuit fault designation for the central-locking motors. It also states that the A8 (D5) uses fully electric door locks (“e-lock”), with microswitches at the inner and outer door handles, while A6/A7 (C8), Q8, and Audi e-tron models use semi-electric door locks with microswitches integrated into the door locks. No further fault mechanism is established by the supplied evidence.

3. What system is affected?

Central locking / door-lock system. The verified source specifically references passenger-side door control modules and central-locking motors.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • Not yet established by verified evidence.

6. Possible causes

  • The verified evidence establishes only the DTC description: central-locking motors open circuit.
  • Any specific wiring, connector, motor, lock, handle, microswitch, control-module, or software cause is 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

  • Arrange diagnosis by an Audi-qualified service provider if the DTC is present.
  • Do not attempt high-voltage repairs. The supplied evidence does not establish any high-voltage-system involvement.

10. Step-by-step troubleshooting

  1. A service provider can confirm the stored DTC and identify the reporting door control module. The supplied evidence identifies rear passenger-side door control module J927 as address word 00BC in its example.
  2. Further diagnostic steps are not yet established by verified evidence.

11. When to contact service

Service need is not yet established by verified evidence. If diagnosis or repair is desired, contact an Audi-qualified service provider.

12. What the service center may check

  • Confirm B122B13 in the applicable door control module.
  • The source references passenger-side door control modules, including J927 / address word 00BC for the rear passenger-side door.
  • Additional service checks are not yet established by verified evidence.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Audi manufacturer communication A5722912063236_3, published June 8, 2022; filed by NHTSA as MC-10214744-0001: https://static.nhtsa.gov/odi/tsbs/2022/MC-10214744-0001.pdf
  • Audi manufacturer communication A5721872063236_2, published December 8, 2021; filed by NHTSA as MC-10204729-0001: https://static.nhtsa.gov/odi/tsbs/2021/MC-10204729-0001.pdf
  • Audi manufacturer communication A5721822063236_1, published July 30, 2021; filed by NHTSA as MC-10199640-0001: https://static.nhtsa.gov/odi/tsbs/2021/MC-10199640-0001.pdf

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified applicability in the supplied data is United States Audi A7, A8, RS e-tron GT, e-tron, and e-tron GT model years 2019–2023, with overlapping 2020–2022 records. Applicability to a specific vehicle must be confirmed by VIN and service information.

19. Frequently asked questions

What does Audi code B122B13 mean?

The verified manufacturer communication identifies B122B13 as “Central locking motors Open circuit.”

Is B122B13 an EV high-voltage fault?

Not yet established by verified evidence. The supplied evidence concerns the central-locking and door-lock system, not the high-voltage system.

Which Audi vehicles are covered by the supplied applicability data?

US-market 2019–2023 Audi A7, A8, RS e-tron GT, e-tron, and e-tron GT records are supplied. Exact applicability requires VIN confirmation.

20. Sources & verification

Verified
Audi B122B13:  DTC B122D29 (Lock unit for central locking Implausible… | EV Diagnostics