2022-2024 Audi e-tron GT Lane Departure Warning Fault TSB

Owners of 2022-2024 Audi e-tron GT and RS e-tron GT vehicles may encounter an instrument cluster message stating "Lane departure warning fault" when the vehicle is started. This condition is addressed by Audi Technical Service Bulletin (TSB) 48 23 42 2069614/3.

This TSB, which supersedes previous bulletin 48 23-39 dated March 27, 2023, clarifies that certain Diagnostic Trouble Codes (DTCs) associated with this warning do not indicate an actual fault requiring repair.

Symptoms

The primary symptom owners will notice is the instrument cluster displaying the message "Lane departure warning fault" upon vehicle startup. This message indicates a perceived issue with the lane assist system.

Fault Codes / DTCs

When a technician diagnoses the vehicle, the following DTCs may be found stored in the J500 steering control unit (address 0044):

| Code | Description | Symptom Code | | :--- | :---------- | | U13D500 | Function restriction, directional stabilization assistance | 15872 | | C135DF1 | Power steering control module does not implement request | 17920 |

Diagnosis and Trigger Conditions

Audi's technical background for TSB 48 23 42 2069614/3 states that these specific DTCs, U13D500 and C135DF1, when stored in the J500 control unit, do not actually affect the functionality of the vehicle or the lane assist system. Furthermore, these DTCs are considered unlikely to reoccur.

Important Warnings for Owners and Technicians

Audi explicitly states that if only DTCs U13D500 and C135DF1 are stored in address 0044, technicians do not perform any repair work. The TSB emphasizes:

• "The replacement of parts does not solve this issue."
• "Claims for replaced parts will be subject to review."

This means that attempting to replace components will not resolve the issue and may result in unnecessary costs or warranty claim rejections.

Repair Procedure Summary

For the 2022-2024 Audi e-tron GT and RS e-tron GT, if a diagnostic scan reveals only DTCs U13D500 and C135DF1 in the J500 steering control unit, the prescribed action is to simply clear the DTCs and release the vehicle. No physical repair or part replacement is required, as these codes do not indicate a functional problem.

Owner Action

If you own a 2022-2024 Audi e-tron GT or RS e-tron GT and see the "Lane departure warning fault" message, and a diagnostic scan confirms only DTCs U13D500 and C135DF1 are present in the J500 steering control unit, you should be aware that no repair is needed. Inform your service technician about this TSB (48 23 42 2069614/3) to ensure they follow the correct procedure of clearing the codes without performing unnecessary repairs. This TSB is informational and not covered by Audi warranty, meaning diagnostic time to confirm these codes may be charged, but no repair cost should be incurred for these specific DTCs.

Revision History

This Technical Service Bulletin has undergone several revisions:

• Revision 3 (June 29, 2023): Revised header to add model year information.
• Revision 2 (March 27, 2023): Revised the technical background and warranty information.
• Revision 1 (March 07, 2023): Initial publication of the bulletin.

---

Source: NHTSA ID: 10238317