Autodata Technical Issue 65 – Fuel filler nozzle continuously cuts out when re-fuelling 2015 Audi Q3 2.0 TDI

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Q. A customer’s Audi Q3 2,0 TDI is in for a routine service and they have complained that the fuel filler nozzle continuously cuts out when re-fuelling the vehicle. We have experienced the fault when re-fuelling and have visually checked the fuel filler pipe for blockages but we cannot find the source of the fault. Is this something you have heard of before?

A. Yes, we have heard of this fault before on Audi Q3 models with CFFB engine code. The cause is due to the fuel tank ventilation system becoming blocked. Check the fuel tank breather cap for blockages, replace it if necessary (fig. 1.1.). Check the fuel tank breather hose and the fuel tank breather valve for blockages (fig. 1.2. & fig 1.3.). If the fuel tank breather hose or the fuel tank breather valve is blocked, fit a new fuel tank. Re-fuel vehicle to ensure fault has been resolved

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