2022-2024 Audi e-tron GT Lane Departure Warning Fault TSB
Audi has issued Technical Service Bulletin (TSB) 48 23 52 2071085/1 for 2022-2024 e-tron GT and RS e-tron GT models. This TSB addresses a "Lane departure warning fault" message and related diagnostic trouble codes U13D500 and C135DF1, which are caused by a software issue in the J500 control unit.
Also applies to
- Audi e-tron GT
- 2022–2024
- Audi RS e-tron GT
- 2022, 2024
Owners of 2022-2024 Audi e-tron GT and RS e-tron GT vehicles may encounter a "Lane departure warning fault" message appearing in the instrument cluster upon vehicle startup. This issue is linked to specific diagnostic trouble codes (DTCs) stored in the steering control unit, J500.
This Technical Service Bulletin (TSB) 48 23 52 2071085/1 outlines a software-related problem within the J500 control unit that causes this warning. Fortunately, an improved software version is available to address this concern.
Symptoms
If your 2022-2024 Audi e-tron GT or RS e-tron GT is affected, you will typically observe the following:
- A message stating "Lane departure warning fault" appears in the vehicle's cluster when the vehicle is started.
Fault Codes / DTCs
When diagnosing the "Audi e-tron GT lane departure warning fault", technicians will find the following DTCs logged in the steering control unit (J500), address word 0044:
| Code | Description | Module |
|---|---|---|
| U13D500 | Function restriction, directional stabilization assistance | J500 steering control unit |
| C135DF1 | Power steering control module does not implement request | J500 steering control unit |
Technical Background
The root cause of the "Audi e-tron GT lane departure warning fault" and the associated DTCs U13D500 and C135DF1 is a software issue within the J500 control unit. Audi has identified this internal software problem and developed a solution.
Repair Procedure Summary
The repair for this issue involves updating the software of the J500 control unit. This is performed using the Software Version Management (SVM) system.
- Review SVM Instructions: Technicians must first follow all instructions detailed in TSB 2011732, which covers general SVM operating procedures.
- Software Update: The J500 control unit (address 0044) needs to be updated using the SVM action code 44A039. The new software version is 0450 or higher, replacing the old software version 0430, for part number 9J1907445.
Improved software has been integrated into production vehicles since June 27, 2022.
Warranty Information
This TSB 48 23 52 2071085/1 outlines specific warranty claim types and conditions:
- Standard Warranty: Applicable for vehicles up to 48 months or 50,000 miles.
- CPO Vehicles: For Certified Pre-Owned (CPO) vehicles, use claim type G10 and verify owner eligibility.
- Service Number: 4835
- Damage Code: 0040
- Diagnostic Time: GFF 0150 0000, with time stated on the diagnostic protocol (maximum 50 TU).
- Road Test: No allowance for road tests before or after the service procedure (0 TU).
- Claim Comment: As per TSB 2071085/1.
All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual and are subject to audit.
Important Warnings
- If your vehicle is outside of its warranty period, this Technical Service Bulletin is provided for informational purposes only. Owners of vehicles outside warranty should consult with their dealer regarding potential costs for this software update.
NHTSA ID: 10240146
Frequently Asked Questions
- What does the "Lane departure warning fault" message mean in my Audi e-tron GT?
- This message indicates a malfunction in your vehicle's lane departure warning system. According to Audi TSB 48 23 52 2071085/1, it's typically caused by a software issue in the J500 steering control unit, leading to DTCs like U13D500 and C135DF1.
- What are DTC U13D500 and C135DF1?
- DTC U13D500 signifies a 'Function restriction, directional stabilization assistance,' while C135DF1 means the 'Power steering control module does not implement request.' Both codes are stored in the J500 steering control unit and are related to the "Audi e-tron GT lane departure warning fault".
- How is the "Lane departure warning fault" fixed on my Audi e-tron GT?
- The fix involves a software update to the J500 control unit using Audi's Software Version Management (SVM) system. Your dealership will apply SVM action code 44A039 to install the improved software, as detailed in TSB 48 23 52 2071085/1.
- Is this software update covered under warranty?
- Yes, if your 2022-2024 Audi e-tron GT or RS e-tron GT is within the standard warranty period (up to 48 months or 50,000 miles) or is a CPO vehicle, this software update is typically covered. Always confirm with your Audi dealer.
Other revisions of this TSB
- 2022-2024 Audi e-tron GT Lane Departure Warning Fault TSBU13D500, C135DF1
- 2022-2023 Audi e-tron GT Lane Departure Warning Fault TSBU13D500, C135DF1
- 2022-2023 Audi e-tron GT Lane Departure Warning Fault TSBU13D500, C135DF1
What Audi RS e-tron GT owners report
Counted from the records in our database across 3 model years.
- 7
- Owner complaints
- 8
- Recalls
- 1,057
- Service bulletins
- 1
- Crashes reported
- 0
- Fires reported
- 0
- Injuries reported
The 2023 model year
2 complaints, the 2nd most of 3 model years on file. Owners reported 0 crashes, 0 fires and 0 injuries for this year, which also has 8 recalls on file.
Electrical System and Power Train, the system this article covers, accounts for 3 of 7 complaints (43%).
Complaints by model year
| 2022 | 4 | |
|---|---|---|
| 2023 | 2 | |
| 2024 | 1 |
Most-reported systems
- Back Over Prevention — 2
- Power Train — 2
- Electrical System — 1
- Forward Collision Avoidance — 1
- Fuel/Propulsion System — 1
Latest recalls for the 2023 model year
- 25V900000 — Back Over Prevention (Dec 2025)
- 25V227000 — Air Bags (Apr 2025)
- 24V726000 — Electrical System (Sep 2024)
Complaints are owner reports filed with NHTSA. They are unverified, and counts depend on how many vehicles were sold, so they are not a failure rate.
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