2021 Audi Q8 'Please reduce oil level' Message TSB

Owners of certain 2021 Audi vehicles, including the Audi Q8, may encounter an instrument cluster or MMI message stating "Please reduce oil level." This condition is detailed in Audi Technical Service Bulletin (TSB) 01 20 76 2054893/3, which supersedes TSB 20-44 dated February 20, 2020. The bulletin provides guidance for diagnosing and resolving this issue, particularly for vehicles equipped with the 3.0 TFSI engine.

Symptoms

The primary symptom is the appearance of the verbatim message:

• "Please reduce oil level"

This message will be displayed in the vehicle's instrument cluster or the Multi-Media Interface (MMI) system. A visual indicator, such as an oil level warning icon, may also accompany the message.

Why the "Please reduce oil level" message appears

Audi's technical background explains that modern engines, designed for high thermal efficiency, may not fully evaporate fuel from the engine oil under certain driving conditions. This leads to fuel dilution, which can increase the overall oil level. The main contributing factors include:

• Frequent short trips: When the engine rarely reaches its fully stabilized operating temperature (between 176°F (80°C) and 248°F (120°C)), fuel evaporation from the oil is incomplete.
• Cold weather climates: These conditions exacerbate the issue, as the engine takes longer to warm up.

Essentially, the engine oil level appears too high because unburnt fuel has mixed with the oil, increasing its volume. This is not necessarily an indication of overfilling but rather a consequence of specific driving patterns.

Repair Procedure Summary

If your 2021 Audi Q8 or other affected model displays the "Please reduce oil level" message, a dealer visit is recommended. The repair procedure outlined in TSB 01 20 76 2054893/3 involves several steps:

1. Oil Level Verification: Technicians will first verify the actual engine oil level using a specialized dipstick tool, T40178B, following the Elsa Repair Manual procedures. If the oil level is not found to be above the maximum mark, this bulletin does not apply.
2. Customer Communication (First Visit): For first-time occurrences, the service technician will inform the owner that the condition is often linked to repetitive short-distance driving. They will advise that occasionally warming up the engine, such as with a 30-minute or longer highway drive, can help prevent fuel dilution.
3. Oil and Filter Change (First Visit): As a courtesy, a one-time engine oil and filter change will be performed according to the ELSA Repair Manual.
4. Customer Communication (Repeat Visit): For repeat customers, the same advice regarding warming up the vehicle will be provided. An oil change may be performed under CAP/Goodwill if necessary.

Required Parts and Tools

To perform the service described in TSB 01 20 76 2054893/3, specific parts and tools are required:

• Oil Filter: Part number 06M198405F (Quantity 01)
• Engine Oil: As specified in ETKA
• Fasteners, Bolts, Nuts, and Screws: As needed per the Repair Manual (See ETKA)
• VAS Tester: VAS 6160 or VAS 6150 with the current version of ODIS (Windows 10)
• Dipstick: T40178B

Warranty Information

This service is covered under warranty for up to 48 months or 50,000 miles. For Certified Pre-Owned (CPO) vehicles, the claim type is G10. If the vehicle is outside of warranty, this Technical Service Bulletin is for informational purposes only. The relevant warranty codes include Service Number 1711 and Damage Code 0010. Labor operations for performing the oil change are 1701 9999 (30 TU), with no allowance for diagnostic time (GFF) or road tests.

What Owners Should Know

If your 2021 Audi Q8 or other applicable model displays the "Please reduce oil level" message, it's important to understand the underlying cause. While it might seem alarming, it's often a result of driving habits rather than a mechanical failure or overfilling. To potentially mitigate the issue:

• Occasional Longer Drives: Make an effort to take your vehicle on longer drives (e.g., 30 minutes or more on a highway) to allow the engine to reach and maintain its optimal operating temperature. This helps burn off fuel contaminants in the oil.
• Dealer Visit: Schedule an appointment with an authorized Audi dealer to have the oil level verified and, if necessary, an oil and filter change performed as per TSB 01 20 76 2054893/3.

NHTSA ID: 10178560