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Thread: MK5 GTI - PO171 system bank to lean

  1. #1
    Junior Member dazzmc35's Avatar
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    May 2015
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    Darren
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    MK5 GTI - PO171 system bank to lean

    Hi Guys

    Having an issue with a vacuum leak po171. Been reset a few times after changing brake booster with check valve and cleaning MAF. Code still coming up. Is there a vagcom guy in bayside area Brisbane who can help diagnose or other?

    Appreciate it, Darren

  2. #2
    Super Moderator Lucas_R's Avatar
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    Golf R
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    Lucas
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    Could be the PCV valve - very common on the Mk5 GTI. You can get PCV delete kits for about $100

  3. #3
    Junior Member dazzmc35's Avatar
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    Darren
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    Thanks. It ended up being vacuum leak on rear brake hose. All good

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