2021 Audi e-tron Headlamp Warning C119911 TSB

Owners of 2021 Audi e-tron and e-tron Sportback vehicles may encounter a warning message in the instrument cluster related to the headlights. This condition, while triggering a warning, typically does not affect the actual operation of the headlights. However, it indicates a diagnostic fault that needs to be addressed.

Symptoms

Customers may observe the following symptom in their vehicle:

• A warning message is displayed in the instrument cluster regarding the headlights.

Despite the warning, workshop findings indicate that the headlight operation itself is not compromised. The primary concern is the persistent warning message and the stored diagnostic trouble code.

Fault Codes / DTCs

When diagnosing the headlamp warning, technicians will find a specific Diagnostic Trouble Code (DTC) stored in the vehicle's light control modules. This code points to the root cause of the warning message.

Code	Description	Module
C119911	High beam bulb, short circuit to ground	J1018/A27 (left light control module) and/or J1023/A31 (right light control module)

Technical Background

Audi has identified that the underlying cause for the Audi e-tron headlamp warning C119911 is an overly sensitive diagnostic software within the light control modules. This sensitivity leads to the erroneous detection of a "High beam bulb, short circuit to ground" fault, even when no actual electrical short exists and the high beam functions correctly. This issue was addressed in production with updated software.

Repair Procedure Summary

The repair for the Audi e-tron headlamp warning C119911 involves updating the software for the left and right light control modules (J1018/A27 and J1023/A31). This procedure is performed using the Software Version Management (SVM) system.

1. Verify Concern: The technician must first confirm that the customer's reported symptom and the stored DTC C119911 match the conditions described in the TSB and that no other underlying issues are present.
2. SVM Update: The light control modules will be updated using the SVM action code D6A010. This requires following the detailed operating instructions provided in TSB 2011732, titled "00 Software Version Management (SVM), operating instructions."
3. Software Container: The update will change the software from the Old Target Data Container Number 4KE909472F to the New Target Data Container Number 4KE909472H (or a newer version).

This software update recalibrates the diagnostic sensitivity, preventing the false detection of a short circuit and eliminating the headlamp warning message.

Important Warnings

For vehicles equipped with high-voltage components, a critical safety step must be followed during the software update process:

• To prevent charging of the high-voltage battery during the software update, the high-voltage charging cable is to be removed BEFORE entry of the SVM code on vehicles with high-voltage components. Failure to do so could lead to damage to the high-voltage components.

Owner Action / Warranty Information

If your 2021 Audi e-tron is displaying a headlamp warning or has stored DTC C119911, you should schedule an appointment with an authorized Audi dealership. The software update is covered under warranty for up to 48 months or 50,000 miles, whichever comes first. For Certified Pre-Owned (CPO) vehicles, coverage falls under G10 after owner verification. If the vehicle is outside of warranty, this Technical Service Bulletin serves as informational guidance.

• Service Number: 9407
• Damage Code: 0039
• Labor Operation: Software Update (Includes checking for DTCs) - 0151 0000

This TSB, numbered 2063125/1, was issued on May 19, 2021.

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Source: NHTSA ID: 10194380