2005-2024 Audi TFSI Engine Rough Idle TSB

Symptoms and Diagnosis

Owners of 2005-2024 Audi vehicles with TFSI engines may notice that the "Engine does not run smoothly at idling speed after cold start." This issue is particularly common in vehicles primarily used for short drives. Technicians investigating this concern may find "sporadic misfiring logged in event memory of engine control unit."

Technical Background

The primary cause of the Audi TFSI rough idle and misfiring is identified as deposits accumulating in the inlet ports and on the inlet valves. These carbon deposits can interfere with proper airflow and fuel mixture, leading to the observed engine performance issues.

Repair Procedure: Walnut Blasting

To resolve the Audi TFSI rough idle condition, Technical Service Bulletin 15 24 53 2075530/1 recommends cleaning the inlet valves and ports through a process known as walnut blasting. This method effectively removes carbon deposits without requiring the removal of the cylinder head. Technicians will only need to remove the intake manifold and/or compressor to access the affected areas and perform the cleaning according to specific repair instructions.

Required Tools and Materials

Performing this repair requires specialized tools to ensure effective cleaning and proper diagnosis. These include:

• Granulate blasting unit: VAS 294 011 (an image of this unit is provided in the TSB)
• Granulate or Granulate ASE: VAS 294 011/8 or VAS 294 012 70 H00
• VAS tester with ODIS: VAS 6160/VAS 6150, running the current version of ODIS (Windows 10)

Warranty and Labor Operations

This Technical Service Bulletin, identified as TSB 15 24 53 2075530/1, outlines specific procedures for warranty claims. The Service Number for this issue is 1570, and the Damage Code is 0055. The claim comment specifies, "As per TSB 2075530/1."

Labor operations and their associated time units (TU) for this repair are as follows:

Labor Operation	Code	Time Units (TU)
Remove and install intake manifold	2447 19XX	See SRT with associated operations
Remove and install compressor	2114 19XX	See SRT with associated operations
Clean cylinder head 4 cyl.	1570 2999	90 TU
Clean cylinder head 5 cyl.	1570 2999	110 TU
Clean cylinder head 6 cyl.	1570 2999	130 TU
Clean cylinder head 8 cyl.	1570 2999	160 TU
Clean cylinder head 10 cyl.	1570 2999	190 TU
Clean cylinder head 12 cyl.	1570 2999	230 TU
GFF (Guided Fault Finding)	N/A	0 TU
Road test prior to service	N/A	0 TU
Road test after service	N/A	0 TU

All warranty claims submitted for payment must adhere to the Audi Warranty Policies and Procedures Manual and are subject to review or audit by Audi Warranty.

Important Owner Information

Owners should be aware that "If the vehicle is outside of any warranty, this Technical Service Bulletin is informational only." In such cases, the repair costs may not be covered by Audi. It is always recommended to consult with an authorized Audi service center to determine the applicability of this TSB to your specific vehicle and its warranty status.

NHTSA ID: 11009928