2022-2024 Audi Driving Issues from Diesel in Gasoline TSB

Audi has issued Technical Service Bulletin (TSB) 01 24 34 2074976/1 to address specific driving behavior problems and functional restrictions that can occur if diesel fuel is mistakenly added to a gasoline-powered vehicle. This TSB, dated August 30, 2024, applies to all Audi vehicles from model years 2013-2024, though the primary vehicle for this document is the 2022 Audi e-tron.

Symptoms of Wrong Fuel

Owners of affected Audi vehicles, including models like the 2022-2024 Audi e-tron, A3, A4, Q5, and many others, may notice several symptoms if Audi diesel in gasoline is present in the fuel system. These issues stem from the engine's inability to properly combust the incorrect fuel mixture.

Reported customer concerns include:

• "Driving issues such as juddering."
• "Starting problems; the engine starts with a delay."
• "The exhaust emissions warning lamp lights up in the instrument cluster."
• "The EPC (electronic throttle) warning lamp lights up in the instrument cluster."

These symptoms are often a strong indicator that the wrong type of fuel has been introduced into the vehicle's tank.

Diagnosing Diesel in Gasoline

When these symptoms appear, workshops will investigate the possibility of Audi diesel in gasoline contamination. The TSB outlines a straightforward method to confirm if the wrong fuel has been added. This diagnostic procedure involves a simple evaporation test:

1. Obtain a paper towel, preferably blotting paper.
2. Place a few drops of known diesel fuel onto the paper towel (sample 1).
3. Place a few drops of fuel from the vehicle's tank onto the paper towel (sample 2).
4. Place a few drops of known gasoline onto the paper towel (sample 3).
5. Allow the fuel samples to evaporate for approximately 10 to 30 minutes.

After evaporation, compare the residue left by the vehicle's fuel (sample 2) to the known diesel (sample 1) and gasoline (sample 3). If the vehicle's fuel leaves a residue similar to diesel, it confirms a mixture of petrol and diesel.

Repair Procedure Summary

If the diagnostic test confirms the presence of Audi diesel in gasoline, the repair procedure is critical to prevent further damage to the engine and fuel system. The TSB specifies that the fuel tank must be completely discharged. Following this, the entire fuel lines and fuel system must be thoroughly cleaned to remove all traces of the incorrect fuel.

Important Owner Information

Owners should be aware of the financial implications associated with this type of repair. Technical Service Bulletin 01 24 34 2074976/1 explicitly states that if the wrong type of fuel has been added to the tank, this is not a fault covered under warranty. Consequently, any expenses incurred for this repair work, including diagnosis and cleaning, must be covered by the customer.

This TSB is informational only and does not apply to any Audi Warranty claims related to fuel contamination.

What Owners Should Do

If you suspect your Audi is experiencing symptoms related to Audi diesel in gasoline contamination, it is crucial to have your vehicle inspected by an authorized Audi service center as soon as possible. Prompt diagnosis and repair can help prevent more extensive damage to the fuel system and engine components.

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Source: NHTSA ID: 11007301