2025 Audi A5/Q5/S5/SQ5 Parking Lock & Drive System Fault TSB

Audi has released Technical Service Bulletin (TSB) 2080044/1 to address specific transmission and warning lamp issues in certain 2025 Audi A5, Q5, S5, and SQ5 models. This bulletin provides a solution for situations where the parking lock cannot be selected, or a "Drive system: fault" warning appears in the instrument cluster. The underlying cause is an optimized software solution, which is implemented via a combined software update.

This TSB 2080044/1 replaces PSS TSB 2078844, indicating an updated approach to resolving these concerns. Owners experiencing the symptoms described, particularly those related to the Audi P1D4700 P288B00 fault codes, should be aware of this service action.

Symptoms

Owners of affected 2025 Audi vehicles may notice one or more of the following issues:

• The transmission position P (parking lock) cannot be selected, which may prevent the vehicle from being locked securely.
• A yellow warning lamp displaying the message "Drive system: fault" appears in the instrument cluster.
• The instrument cluster may show the yellow warning message "P cannot be selected. Vehicle may roll away! Please contact workshop". This is a critical safety alert indicating the vehicle might not be securely parked.

Fault Codes / DTCs

When these symptoms occur, a technician diagnosing the vehicle may find specific Diagnostic Trouble Codes (DTCs) logged in the main control unit for the drive system and running gear systems (diagnostic address 812C). These codes can be static or intermittent:

Code	Description	Symptom Code
P1D4700	"Parking lock Time exceeded for display"	262145
P288B00	"Park Lock/Pawl Actuator Circuit Performance"	401414

These DTCs, particularly Audi P1D4700 P288B00, directly point to issues with the parking lock mechanism or its control system.

Important Warnings for Owners and Technicians

It is crucial for technicians to accurately diagnose the customer complaint to ensure it aligns with the scope of this TSB. The repair outlined in TSB 2080044/1 should only be performed if all specified criteria, including model/type, chassis number, engine/motor, gearbox code, PR number(s), part number, and software version, apply exactly. Failure to meet these criteria may result in the problem not being resolved, potential repeat repairs, and the warranty claim being rejected, with the cost of parts charged back.

Technical Background

This section is not applicable as per the Technical Service Bulletin.

Production Solution

The root cause of these issues has been addressed through optimized software.

Repair Procedure Summary

To resolve the issues described, a combined software update for various control units must be performed on the vehicle. Before proceeding, technicians must check if TSB 2079690, specifically the software update 03.10.00/C (28.13.01) KD2, is applicable to the vehicle. If it is, the software update described in TSB 2079690 should be performed.

Following the software update, or if the