New Beetle GLS L4-2.0L (AVH) (2001)
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NOTE:
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The pressure retention valve is open in both directions of flow, from the evaporative emissions (EVAP) canister and from EVAP canister purge
regulator valve N80 -arrow 1-.
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It is only open in one direction of flow from the junction piece for the gravity/overflow valve -arrow -2-.
