2025 Audi A5 Gear Selection Issue in Cold Weather TSB

Audi has issued a Technical Service Bulletin (TSB) concerning a specific powertrain issue affecting several 2025 models. This bulletin, identified by NHTSA ID 11021462, provides critical information for technicians to diagnose and address instances where the gear cannot be selected, particularly in cold weather conditions. This issue is relevant for owners searching for information on the 2025 Audi A5 manufacturer_communication regarding gear selection.

Symptoms

Owners of affected 2025 Audi A5, S5, Q5, and SQ5 vehicles may experience difficulty or inability to select a gear. This symptom is specifically noted to occur in cold weather environments, indicating a potential temperature-sensitive fault within the powertrain system.

Fault Codes / DTCs

When the gear selection issue occurs, diagnostic trouble codes (DTCs) may be stored in the vehicle's system. These codes point to specific communication or functional problems within the powertrain. The bulletin highlights the following DTCs:

• U303500: This code typically indicates a general internal control module malfunction or a communication error.
• U029400: This code often relates to lost communication with a specific control module, potentially within the powertrain or transmission system.
• U012900: This DTC usually signifies lost communication with the brake system control module, which can impact gear selection functionality.

These codes are crucial for diagnosing the 2025 Audi A5 manufacturer_communication related to gear selection.

Diagnosis and Trigger Conditions

The primary trigger condition for this issue is cold weather. Technicians should focus their diagnostic efforts on the powertrain components and related communication networks when these symptoms and DTCs are present under cold conditions. The TSB provides guidance on how to properly identify the root cause of the "gear cannot be selected in cold weather" problem.

Repair Procedure Summary

This Technical Service Bulletin (NHTSA ID 11021462) serves to inform technicians about the diagnostic process for the gear selection issue. It provides the necessary information to accurately troubleshoot the problem when DTCs U303500, U029400, and U012900 are present. The bulletin guides technicians through identifying the specific cause of the powertrain communication or function failure in cold weather.

Owner Action

If you own a 2025 Audi A5, S5, Q5, or SQ5 and experience difficulty selecting gears, especially in cold weather, it is recommended to contact your authorized Audi dealership. Inform them about the symptoms and mention the possibility of a 2025 Audi A5 manufacturer_communication regarding this issue. Your dealer will be able to perform the necessary diagnostics and apply the appropriate repair based on the guidance provided in the TSB.

Source: NHTSA ID 11021462