2021-2023 Audi A6/A7 TPMS Warning Light DTC U012700

Owners of 2021-2023 Audi A6, A7, S6, S7, RS 6, and RS 7 models may encounter a "TPMS message in the instrument cluster" or see the "TPMS light is on." These warnings are often accompanied by the storage of diagnostic trouble code (DTC) U012700 in the data bus control module. This issue, detailed in Audi Technical Service Bulletin (TSB) 2065474/5, points to a problem with the Tire Pressure Monitoring System (TPMS) control module.

The TSB, identified as transaction number 2065474/5, was released for publishing on September 25, 2025, and has undergone several revisions, with the latest being Revision 5, which updated labor operations for warranty claims. If you are experiencing an Audi A6 TPMS warning light U012700, this bulletin provides crucial information for diagnosis and repair.

Symptoms

Owners typically report the following symptoms related to this issue:

• A "TPMS message in the instrument cluster" is displayed.
• The "TPMS light is on" in the dashboard.
• The tire pressure loss warning display activates without cause.
• A general tire pressure monitoring system malfunction display activates.
• The tire pressure monitoring system control module, J502 (address word 0065), cannot be reached by a diagnostic tester.

Fault Codes / DTCs

When diagnosing this issue, technicians will typically find the following diagnostic trouble code stored in the data bus on-board diagnostic interface, J533 (address word 0019):

Diagnostic Address	Diagnostic Trouble Code	Fault Symptom	Storage State
0019 Data Bus OBD Interface	U012700	Lost Communication With Tire Pressure Monitor Module	static

This DTC U012700 is often associated with symptom code 131595, indicating a "Tire Pressure Monitoring Control Module - no communication."

Technical Background

The root cause of the Audi A6 TPMS warning light U012700 and related issues is environmental. According to Audi, moisture can enter the TPMS control module, J502, through its pressure equalization element. This moisture ingress can lead to the failure of the control module, disrupting its communication with other vehicle systems and triggering the warning light and DTC U012700.

Audi implemented a production solution starting in July 2022, introducing an updated bracket, part number 4E0 810 675 B, to mitigate this issue in newly manufactured vehicles.

Repair Procedure Summary

To resolve the "TPMS message in the instrument cluster" and DTC U012700, technicians should follow these steps:

1. Initial Inspection: Check the wiring and pins at the connector for the tire pressure monitoring system control module, J502. Measure the voltage supply to ensure it is within specifications.
2. Module Replacement (If necessary): If no wiring or voltage irregularities are detected, the TPMS control module, J502, should be replaced. Concurrently, the new bracket, part number 4E0 810 675 B, must be installed. This new bracket replaces the standard bracket 4K0 907 249 A.
3. Wiring Routing Check: Ensure the wiring is routed correctly at both the new bracket and the connector. It is critical that the wiring is routed straight into the connector housing to maintain proper sealing and prevent future moisture intrusion.
4. System Test: After the repair, the entire system must be tested to confirm that all tire pressures are being read accurately and that the TPMS warning light is off.

Required Tools or Parts

For this repair, the following parts are typically required:

• Bracket: Part number 4E0 810 675 B (Quantity: 01)
• TPMS Control Module: (Quantity: 01) – Specific part number to be determined via ETKA.
• Fasteners, Bolts, Nuts, and Screws: As needed per the repair manual, available via ETKA/ELSA.

Always consult with your Parts Department and/or ETKA for the most current information and part bulletins.

Important Warnings

Owners should be aware that if their vehicle is outside of its warranty period, this Technical Service Bulletin 2065474/5 serves as informational guidance only. Any warranty claims must adhere to the Audi Warranty Policies and Procedures Manual and are subject to review or audit by Audi Warranty.

Owner Action

If your 2021-2023 Audi A6, A7, S6, S7, RS 6, or RS 7 is displaying a "TPMS message in the instrument cluster" or the TPMS warning light, and you suspect the presence of DTC U012700, it is recommended to schedule an appointment with an authorized Audi service center. Provide them with the symptoms you are experiencing and mention Technical Service Bulletin 2065474/5 to help expedite the diagnostic process.

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Source: NHTSA ID: 11023745