2023-2024 Audi TFSI Engine Rough Idle TSB 2075530/2

Audi has released Technical Service Bulletin (TSB) 2075530/2 to address a common concern among owners of 2023-2024 Audi TFSI engines: the engine not running smoothly at idling speed. This issue is particularly noticeable after a cold start and is often linked to carbon buildup within the engine's intake system. The TSB provides a detailed repair procedure to resolve this condition.

Symptoms

Owners may observe the following symptoms indicating an issue with their Audi TFSI engine's idle performance:

• "Engine does not run smoothly at idling speed after cold start."

Diagnosis and Trigger Conditions

When diagnosing this issue, technicians may find "sporadic misfiring logged in event memory of engine control unit." This problem tends to occur more frequently in vehicles that are primarily used for short drives, which can contribute to increased carbon deposit formation.

Technical Background

The root cause of the rough idling and misfiring in affected Audi TFSI engines is the accumulation of carbon deposits. These deposits form in the inlet ports and on the inlet valves, restricting airflow and affecting combustion efficiency, especially at idle speeds.

Repair Procedure Summary

The recommended repair involves cleaning the inlet valves and ports using a specialized walnut blasting technique. This procedure is designed to remove carbon buildup effectively without requiring the removal of the entire cylinder head. Technicians will need to remove the intake manifold and compressor to access the affected areas. The cleaning process should follow the specific instructions outlined in the repair manual.

Required Tools or Parts

To perform the walnut blasting procedure as described in TSB 2075530/2, specific tools and materials are required:

• Granulate blasting unit: VAS 294 011
• Granulate: VAS 294 011/8 or VAS 294 012 70 H00
• Diagnostic Tester: VAS 6160/VAS 6150 (a VAS tester with the current version of ODIS, running on Windows 10, is necessary for proper diagnosis and post-repair checks).

Important Warnings

Owners should be aware that if their vehicle is outside of its warranty period, this Technical Service Bulletin is informational only. This implies that the cost of the repair may not be covered by Audi. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual, and claims are subject to review or audit by Audi Warranty.

Owner Action

If you are experiencing a rough idle with your 2023-2024 Audi TFSI engine, particularly after a cold start, it is recommended to schedule an appointment with an authorized Audi service center. Inform them about the symptoms you are observing and mention Technical Service Bulletin 2075530/2. The service center will be able to diagnose the issue and perform the necessary walnut blasting procedure to resolve the carbon buildup.

NHTSA ID: 11016532