2025 Audi A5/Q5 Gearbox Fault P284D00

Symptoms

Owners of affected 2025 Audi A5, Q5, S5, and SQ5 models may observe a yellow warning lamp illuminated on the instrument cluster, accompanied by a specific message. The primary customer-facing symptom is the warning message: "Drive system: fault. Limited performance. Please contact workshop".

Beyond the warning message, drivers might experience issues with the transmission's functionality. This can include difficulty engaging 1st or 7th gear, or a general feeling of the transmission operating partially out of order. A transmission malfunction display may also activate, indicating a problem with power distribution within the transmission.

Fault Codes / DTCs

When diagnosing the "Drive system: fault" condition, technicians will likely find a specific Diagnostic Trouble Code (DTC) stored in the transmission control module -J217- (address word 0002). This DTC points to an internal transmission issue.

Diagnosis and Trigger Conditions

The DTC P284D00, indicating "Shift Fork 'A' Unrequested Movement", is logged in the transmission control module -J217-. This fault can be either static (constantly present) or intermittent. The symptom code associated with this specific fault is 20839.

To properly diagnose this condition, technicians will first read all transmission measured values from address 0002 and upload them to the Guided Fault Finding (GFF) paperless system. A crucial diagnostic step involves cycling the ignition: switching it off, then waiting three minutes without any vehicle operation, including not opening doors or using the MMI. After this waiting period, Guided Fault Finding is used to work through the test plan for the P284D00 entry.

Repair Procedure Summary

Audi Technical Service Bulletin 2078846/1 outlines the steps for addressing the P284D00 fault. The initial repair involves using the Guided Fault Finding system to diagnose the root cause.

If Guided Fault Finding does not identify a specific cause for the fault, a routine to improve shift quality is performed. This involves accessing the Guided Function menu, navigating to "0002 - Analysis functions transmission", and then selecting "2- Calibration of Gear Position Distance Sensors -G487- to -G490-" as a control measurement. This calibration procedure for the gear position sensors must be repeated 10 times to ensure proper adjustment and function.

Important Warnings

Owners should be aware of specific conditions regarding this Technical Service Bulletin 2078846/1. For vehicles still within the new model launch repair authorization period, workshops are required to create a case with the Technical Assistance Center (TAC) for repair authorization. The TSB number must be referenced in the first line of the TAC case.

Furthermore, if your vehicle is outside of its warranty period, this Technical Service Bulletin is for informational purposes only. The repair may not be covered by Audi if the warranty has expired.

Warranty Information

For repairs performed under warranty, Audi specifies certain codes for processing claims. The Service Number is 3410, and the Damage Code is 0010. Labor operations related to Guided Fault Finding (GFF) are coded as 0150 0010 and 0150 0060. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual. The claim comment should reference TSB 2078831/1.

NHTSA ID: 11022651