2021-2022 Audi Transmission Control Module DTC TSB

Symptoms

This manufacturer communication addresses situations where a "DTC stored in the transmission control module" is detected. While the specific owner-perceptible symptoms are not detailed in the summary, the presence of a DTC typically indicates an underlying issue that may trigger a malfunction indicator light (MIL) on the dashboard or affect vehicle performance. Owners might notice unusual shifting behavior or other transmission-related concerns.

Fault Codes / DTCs

This repair bulletin, identified by NHTSA ID 10205902, specifically targets a generic "DTC stored in the transmission control module." The document summary does not specify a particular Diagnostic Trouble Code (DTC) number (e.g., Pxxxx, Bxxxx, Cxxxx, Uxxxx). If your vehicle has a warning light related to the powertrain or transmission, a diagnostic scan by a qualified technician will reveal the specific DTCs present.

Diagnosis / Trigger Conditions

The manufacturer communication outlines a process to address the condition where a "DTC stored in the transmission control module" is found. Typically, diagnosis involves connecting a diagnostic tool to the vehicle's On-Board Diagnostics (OBD-II) port to read the stored fault codes. The specific conditions that trigger this DTC are not elaborated in the provided summary, but they relate to the electrical system's software and the automatic transmission's control module.

Repair Procedure Summary

This repair bulletin describes the process to address a "DTC stored in the transmission control module." While the exact steps are not detailed in the summary, such issues often involve updating the software for the Transmission Control Module (TCM) or Powertrain Control Module (PCM). This software update aims to correct the logic or parameters that are causing the DTC to be set. Owners experiencing an Audi Q7 transmission control module DTC should have their vehicle inspected by an authorized Audi service center.

Owner Action

If you own a 2021-2022 Audi Q7, A4, A5, A6, or Q5 and suspect an issue with your transmission or have a warning light illuminated, it is recommended to contact an authorized Audi dealership. They can perform a diagnostic scan to determine if your vehicle has a "DTC stored in the transmission control module" and apply the necessary repair procedure outlined in this manufacturer communication (NHTSA ID 10205902). This type of repair, being a manufacturer communication, is typically covered under warranty if your vehicle is still within the warranty period.

Source: NHTSA ID 10205902