G-8VXWWTRHPN 2023 Passat 206TSI B8 R-Line Wagon; Petrol tank knocking, and high pressure - VWWatercooled Australia

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2023 Passat 206TSI B8 R-Line Wagon; Petrol tank knocking, and high pressure

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  • 2023 Passat 206TSI B8 R-Line Wagon; Petrol tank knocking, and high pressure

    Hi,

    2023 Passat 206TSI B8 R-Line Wagon

    Yesterday, I noticed a knocking sound coming from the petrol tank area, after driving the car. This is the first time it happened and it was 35 degrees yesterday for reference.

    I opened the fuel cap and a rush of air / vapour came out which was unusual. This stopped the knocking. Driving again, the same thing happened, and the same cap removal stopped it.

    I looked into it and apparently it might be related to the purge valve, but I am getting no codes when scanning, and there is no engine light on.

    Anyone else had this issue? If so, what was the cause / fix, etc.?

  • #2
    The high heat/high humidity the past few days might be playing a part here, but the charcoal canister and evap purge valve should be releasing any excess pressure and fumes from the petrol tank.
    2017 Ford Fiesta ST the go kart

    2015 Audi SQ5 bi-turbo V6 TDI family hauler

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