2021-2022 Audi A6 / A7 3.0TFSI Engine Misfires TSB

Symptoms of Engine Misfires

Owners of 2021-2022 Audi A6, A6 Avant, A6 allroad, A7, and A7 Sportback models with the 3.0TFSI engine may experience specific symptoms indicating an engine misfire. These include the Malfunction Indicator Lamp (MIL) illuminating or flashing, or a general report of misfires by the customer. The Audi A6 3.0TFSI engine misfires are typically accompanied by misfire Diagnostic Trouble Codes (DTCs) stored for more than one cylinder on Bank 2.

Fault Codes / DTCs

When diagnosing misfires, specific DTCs may be stored in the vehicle's memory. Examples of misfire-related codes include:

• P030500: Cyl.5 Misfire Detected
• P030600: Cyl.6 Misfire Detected

These codes indicate misfires occurring on specific cylinders. The ambient conditions recorded with these DTCs often show misfires happening at or near the same timestamp.

Diagnosis and Trigger Conditions

This Technical Service Bulletin (TSB) 01 21 02 2058038/3 applies only if a specific set of conditions are met. These conditions help technicians accurately identify if the issue aligns with the known software calibration problem:

• The Malfunction Indicator Lamp (MIL) is on or flashing, or the customer reports misfires.
• Misfire DTCs are stored for more than one cylinder on Bank 2.
• DTC ambient conditions indicate misfires occurred at or near the same timestamp.
• DTC ambient conditions show misfires while the engine is operating at "Leerlauf" (idle).
• DTC ambient conditions show misfires when the vehicle speed is at or near 0 km/h.
• The vehicle is NOT currently misfiring when inspected in the workshop.

If these criteria are not met, the vehicle should be diagnosed using the standard GFF process.

Technical Background

The root cause of these Audi A6 3.0TFSI engine misfires is a software calibration issue. This problem is particularly noticeable under certain running conditions, especially when using winter blend fuel, which has a higher vapor pressure. The condition is most likely to occur during colder winter months.

Important Warnings for Owners

Audi explicitly states that owners should be aware of the following:

• "Do not replace any components for this condition since this will not resolve the customer’s concern."

This means that replacing parts like spark plugs, ignition coils, or injectors will not fix the underlying software issue causing the misfires and should be avoided.

Repair Procedure Summary

For vehicles exhibiting the conditions described in TSB 01 21 02 2058038/3, the current service procedure involves a diagnostic approach rather than immediate component replacement:

1. If the customer's vehicle conditions match those outlined in this TSB, technicians should clear any stored DTCs.
2. The vehicle should then be test-driven.
3. If no faults return after the test drive, the customer should be informed that a solution, in the form of improved software, is expected in the fourth quarter of 2021. It is crucial to reiterate that no physical repairs are necessary at this point, as replacing components will not resolve the misfire issue.
4. A Pending Service Solutions (PSS) record must be created in the PSS application via AccessAudi or the Technical Assistance Page in Elsa.

This TSB is for informational purposes only and does not fall under any specific Audi Warranty coverage.

Owner Action

If you own a 2021-2022 Audi A6, A6 Avant, A6 allroad, A7, or A7 Sportback with a 3.0TFSI engine and are experiencing Audi A6 3.0TFSI engine misfires, especially with the MIL on or flashing, it is recommended to visit an authorized Audi dealership. Inform them about the symptoms and mention Technical Service Bulletin 01 21 02 2058038/3. Be aware that a software solution is anticipated, and physical component replacement is not advised for this specific condition.

TSB Revision History

This bulletin has undergone several revisions to provide updated information:

• Revision 3 (April 7, 2021): Revised header (added model year information) and updated the estimate for the Revised Production Solution.
• Revision 2 (September 3, 2020): Revised the estimate for the Revised Production Solution and updated service steps and software release information. This revision supersedes Technical Service Bulletin Group 01 number 20-86 dated September 3, 2020.
• Revision 1 (December 13, 2019): Initial publication of the bulletin.

NHTSA ID: 10190236