2021 Audi e-tron Adaptive Light / Pre Sense Malfunction TSB
Audi has released Technical Service Bulletin (TSB) 96 20 54 2054765/2 addressing adaptive light and pre sense system malfunctions in the 2021 Audi e-tron. This issue is frequently linked to Diagnostic Trouble Code (DTC) C12B3F0 and problems with the front camera's installation.
Sarah Mitchell2021 Audi e-tron
Owners of the 2021 Audi e-tron may encounter issues with their vehicle's adaptive light and pre sense systems. These malfunctions are often accompanied by specific error messages and a Diagnostic Trouble Code (DTC) C12B3F0. Audi has issued Technical Service Bulletin (TSB) 96 20 54 2054765/2 to address these concerns, which primarily stem from an improperly secured front camera for assistance systems.
Symptoms
Owners of an affected 2021 Audi e-tron may observe one or more of the following symptoms:
- An "Adaptive light system error" message displayed in the instrument cluster.
- A "Pre sense system error" message displayed in the instrument cluster.
- During diagnostic calibration, the test program for the "00A5 front camera for driver assist systems -R242 calibration" may fail, showing the error message "The calibration was incorrect. Installation position wrong."
These symptoms are often linked to the Audi e-tron C12B3F0 fault code.
Fault Codes / DTCs
When diagnosing the issue, service technicians may find the following Diagnostic Trouble Code (DTC) stored in the J1121 control module for driver assist systems (address word 00A5):
| Code | Description | Module |
|---|---|---|
| C12B3F0 | Front camera for driver assist systems, dynamic calibration limit exceeded (symptom code 221202) | J1121 |
What the Service Bulletin Says
Technical Service Bulletin 96 20 54 2054765/2 (which supersedes TSB 19-41) details a repair procedure for the adaptive light and pre sense system malfunctions. The core of the problem is often related to the front camera for assistance systems (R242) not being properly secured. The bulletin instructs technicians to check for an aluminum adhesive foil (part number 4K0 907 231 MTR) that is crucial for securing the R242 camera in its bracket.
If this aluminum spacer is missing or if an incorrectly sized spacer is installed, it must be corrected. The procedure involves carefully removing any existing spacer and its adhesive residue, then installing the correct aluminum adhesive foil (4K0 907 231 MTR) to ensure the R242 front camera is properly seated. This correction helps resolve the Audi e-tron C12B3F0 and related calibration issues.
What to Do
If you own a 2021 Audi e-tron and are experiencing adaptive light system errors, pre sense system errors, or have received a diagnosis indicating DTC C12B3F0, it is recommended to contact your authorized Audi dealership. Reference Technical Service Bulletin 96 20 54 2054765/2. The dealership will be able to diagnose the exact cause and perform the necessary repair, which typically involves inspecting and correctly installing the aluminum adhesive foil for the front camera.
Source: NHTSA ID: 10178448
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Frequently Asked Questions
- What does DTC C12B3F0 mean in my 2021 Audi e-tron?
- DTC C12B3F0 in your 2021 Audi e-tron indicates an issue with the front camera for driver assistance systems, specifically that its dynamic calibration limit has been exceeded. This often points to a physical problem with the camera's mounting or stability.
- What are the common symptoms of an adaptive light or pre sense malfunction in a 2021 Audi e-tron?
- Common symptoms include warning messages like 'Adaptive light system error' or 'Pre sense system error' displayed in your instrument cluster. You might also experience diagnostic failures during front camera calibration, with messages indicating incorrect installation position.
- How is the Audi e-tron C12B3F0 issue resolved according to the TSB?
- According to TSB 96 20 54 2054765/2, the issue is typically resolved by inspecting and, if necessary, installing or replacing an aluminum adhesive foil (part number 4K0 907 231 MTR) that secures the R242 front camera for assistance systems in its proper position.
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