2021-2026 Audi Door Lock Malfunction TSB 2063236/8

Symptoms

Owners of 2021-2026 Audi vehicles may experience several issues related to the front or rear door locks. These can include doors that cannot be opened from either the inside or the outside. You might also see warning messages on your instrument cluster concerning the door, the exit warning system, or central locking. In some cases, the vehicle might appear locked, but a door can still be opened without using the key. Overall, the door locks may simply not function as expected. These symptoms are often associated with an Audi door lock malfunction B122D29.

Fault Codes / DTCs

When an Audi door lock malfunction occurs, one or more of the following diagnostic trouble codes (DTCs) may be logged in the vehicle's event memory:

Diagnostic Address	Diagnostic Trouble Code	Fault Symptom	Storage State
0042 - Driver's door electronics	B122D29	Lock unit for central locking implausible signal	Intermittent
0052 - Passenger's door electronics	B122D29	Lock unit for central locking implausible signal	Intermittent
00BB - Rear drivers side door electronics	B14FF29	Motor for child safety lock implausible signal	Intermittent
00BC - Rear passenger side door electronics	B14FF29	Motor for child safety lock implausible signal	Intermittent
00BB - Rear drivers side door electronics	B122D29	Lock unit for central locking implausible signal	Intermittent
00BC - Rear passenger side door electronics	B122D29	Lock unit for central locking implausible signal	Intermittent
0042 - Driver's door electronics	B122B13	Central locking motors Open circuit	Intermittent
0052 - Passenger's door electronics	B122B13	Central locking motors Open circuit	Intermittent
0042 - Driver's door electronics	B14FF29	Motor for child safety lock implausible signal	Intermittent

Diagnosis and Trigger Conditions

Audi Technical Service Bulletin 2063236/8 provides guidance for diagnosing these door lock issues. Technicians are advised to first clarify the exact nature of the complaint with the customer. It's important to determine if the interior door handle was pulled too quickly or past its end stop, as this can sometimes trigger warning messages without indicating an actual fault in the door lock mechanism.

The diagnostic process includes checking if pulling the interior handle twice or using the exterior handle resolves the issue, which could suggest normal mechanical operation rather than a defect. Technicians will read and erase any event memory entries from the control unit. After cycling the ignition and operating the door, they will recheck for logged faults. If the fault does not re-log, the door lock is considered functional.

A thorough mechanical inspection is also crucial. This involves checking the electrical wiring and Bowden cables at the door lock and interior/exterior door handles for any damage or irregularities, such as twisting, incorrect routing, traces of water or ice, or stiffness. The exterior door handle's ability to return to its flush original position should also be verified, with reference to TSB 2060196 if it fails to do so. The door setting itself should be checked for ease of movement and correct closing.

Important Warnings for Owners

Owners should be aware of specific conditions that might lead to perceived door lock malfunctions:

• Incorrect Operation with Convenience Key: For vehicles equipped with a convenience key, incorrect operation by the user can sometimes cause issues. When locking the vehicle, avoid holding the door handle while simultaneously touching the sensor. Similarly, when opening the doors, care must be taken not to touch the sensor on the exterior door handle at the same time (e.g., with your thumb), as this can inadvertently re-lock the vehicle. This user error can lead to a mistaken belief of an Audi door lock malfunction B122D29.
• Unjustified Repairs: Audi warns that replacing parts or attempting repairs without following the specific diagnostic steps outlined in TSB 2063236/8 will not resolve the problem. If such repairs are performed, and the vehicle is under warranty, the costs may be charged back to the owner as invoicing under warranty is not permitted for unjustified work.

Repair Procedure Summary

Technical Service Bulletin 2063236/8 outlines a detailed diagnostic and repair process for door lock complaints. The initial steps focus on verifying the customer's complaint and ruling out incorrect user operation. Technicians will use diagnostic tools to read and clear DTCs such as B122D29, B14FF29, and B122B13, then re-evaluate the system.

If the faults persist, a comprehensive mechanical inspection is performed. This includes checking the electrical wiring and Bowden cables for any damage or irregularities. The functionality of the exterior door handle, specifically its return to the flush position, is also assessed, potentially referencing TSB 2060196. Depending on the findings, the repair may involve removing and reinstalling or replacing components like the door lock, door trim panel, or Bowden cables. The TSB provides specific labor operations (e.g., Service Numbers 5717 for front door locks and 5817 for rear door locks) and time units for these tasks. Additional technical background is available in the Owner's Manual and specific SSP documents.

Owner Action

If your 2021-2026 Audi is exhibiting symptoms of a door lock malfunction, such as doors not opening or warning messages, or if you have diagnostic trouble codes like B122D29, B14FF29, or B122B13, it is recommended to schedule an appointment with an authorized Audi service center. Be prepared to provide a detailed description of when and how the door lock issues occur, including how you typically operate the door handles.

Repairs related to this TSB, 2063236/8, will generally be covered under warranty if your vehicle is within the applicable warranty period. Ensure that the service center follows the diagnostic and repair procedures outlined in the TSB to avoid any potential charges for unjustified work.

Additional Resources

For more information, technicians and owners can refer to the vehicle's Owner's Manual (Chapter "Opening and closing") and specific Self-Study Programs (SSPs) such as SSP 970293 (The 2019 A8 Electrical and Electronic Systems), SSP 990493 (The 2019 A8 Introduction), and SSP 990393 (The 2019 A8 Driver Assistance Systems).

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NHTSA ID: 11017618