2022-2026 Audi Fuel Tank Not Filling TSB 2074853/1

Audi has issued Technical Service Bulletin (TSB) 00 24 90 2074853/1 to address a common observation by owners: the Audi fuel tank not filling to its maximum capacity when the fuel gauge indicates a very low or zero remaining range. This TSB clarifies that this behavior is not a fault but rather a designed characteristic of the vehicle's fuel management system.

Symptoms

Owners typically notice this condition when their vehicle's fuel gauge reads 0 miles or shows a remaining range of 10 kilometers (approximately 6.25 miles). In such scenarios, the fuel tank may not accept its full advertised volume when refilling.

The specific customer statement describing this observation is: "The fuel gauge is at 0 miles or under a remaining range of 10km (6.25 miles) and the tank cannot be filled up to its maximum volume."

Understanding the "Audi Fuel Tank Not Filling" Phenomenon

This behavior is rooted in the sophisticated algorithms Audi vehicles use to calculate and display the remaining fuel range, coupled with a critical safety feature.

Fuel Range Calculation

The vehicle's onboard computer continuously calculates the estimated remaining range based on various factors. This algorithm takes into account the average fuel consumption from both the current driving cycle and previous driving cycles. This dynamic calculation provides a more realistic and adaptive estimate of how far the vehicle can travel on the remaining fuel, rather than a static measurement.

The Safety Reserve

Crucially, even when the fuel gauge displays 0 miles of remaining range, Audi vehicles maintain a built-in fuel reserve. This reserve is a safety concept designed to prevent the vehicle from unexpectedly running out of fuel and stranding the driver. This means that when the gauge hits zero, there is still a small, unindicated amount of fuel left in the tank. Because of this reserve, the tank cannot be filled to its absolute physical maximum capacity if the gauge was already at zero, as a portion of the tank is already occupied by this safety buffer.

What This Means for Audi Owners

For owners experiencing the Audi fuel tank not filling completely under these specific conditions, it's important to understand that this is a normal and intended operational characteristic. It is not indicative of a malfunction in the fuel system, fuel gauge, or tank itself.

Important Information Regarding TSB 00 24 90 2074853/1

Audi Technical Service Bulletin 00 24 90 2074853/1 is classified as an informational bulletin. This means it serves to provide clarity and explanation regarding a vehicle characteristic rather than outlining a repair procedure for a defect. Consequently, there are no production solutions, service actions, or warranty claims applicable to this condition. Owners should not expect a repair or replacement of components related to their Audi fuel tank not filling under these circumstances, as the system is functioning as designed.

Source: NHTSA ID 11007297