2017-2026 Audi Virtual Cockpit Fault: Limited Warning Messages

Owners of various 2017-2026 Audi models may encounter a specific warning message in their virtual cockpit: "Instrument cluster: fault. Limited warning messages. Please contact workshop". This issue, identified by Diagnostic Trouble Code (DTC) B174404, indicates a problem with the instrument cluster's functionality. This Technical Service Bulletin (TSB) 90 24 96 2071281/2 provides the necessary information and repair steps for this condition.

Symptoms

Owners typically observe the following symptoms related to this Audi virtual cockpit B174404 issue:

• A warning message displayed in the virtual cockpit stating: "Instrument cluster: fault. Limited warning messages. Please contact workshop".
• The virtual cockpit may unexpectedly reboot, leading to temporary loss of display information.

Fault Codes / DTCs

The primary diagnostic trouble code associated with this problem is:

• DTC B174404: Faulty multi-function display. This DTC is stored in the virtual cockpit -J285- (address word 0017) and is linked to symptom code 10485834.

Technical Background

The root cause of the "Fault: Limited warning messages" and the associated DTC B174404 is an intermittent malfunction within the graphics module of the Audi virtual cockpit. This internal component issue affects the display's ability to function correctly and consistently.

Production Solution

Audi has implemented an optimized hardware solution for the integrated circuit within the graphics module of newer instrument clusters. This improvement aims to prevent the intermittent malfunction seen in affected units.

Repair Procedure Summary

To address the Audi virtual cockpit B174404 fault, technicians will perform the following steps as outlined in TSB 90 24 96 2071281/2:

1. Document Instrument Cluster Production Date: Before any replacement, the technician must document the production date of the instrument cluster for warranty purposes. This is done by using Self Diagnosis, selecting diagnostic address 17, navigating to the control module OBD drop-down to select "Identification," clicking "show expanded identification," and then expanding "Fazit identification" to record the "Day of manufacture."
2. Replace Audi Virtual Cockpit -J285-: The faulty Audi Virtual Cockpit -J285- (instrument cluster) will be replaced according to the detailed instructions provided in the ELSA repair manual.

Owner Action

If you are experiencing the "Fault: Limited warning messages" in your 2017-2026 Audi's virtual cockpit or if your virtual cockpit is unexpectedly rebooting, it is recommended to schedule an appointment with an authorized Audi service center. Provide them with the exact warning message and any observed symptoms. The repair involves replacing the instrument cluster and should be covered under warranty if your vehicle qualifies.

NHTSA ID: 11002258