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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  • #1

    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.?
    Tags: cap, happened, knocking, passat, stopped
  • #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.
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