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Hissing from engine bay when car switched off..

Discussion in 'A4/S4 forum(B5 Chassis)' started by Dans-first-Audi, Jul 25, 2008.

  1. Dans-first-Audi
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    Dans-first-Audi Member

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    [Jul 25, 2008]
    Any ideas? Sounds like something is venting - car drives fine, but CEL light is on (getting this checked tonight)

    Ideas?
    #1
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  3. Dans-first-Audi
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    Dans-first-Audi Member

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    [Jul 25, 2008]
    Apologies everyone, like a TWAT I didn't do a search, just done one and it seems it's aircon equalising pressure.

    Thank you! :)
    #2

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