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by (101 points)

I could hear a vacuum leak some where in the engine capartment, before I got the car looked at

Vehicle: Vw, beetle, 99, 2.0

1 Answer

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by (11.1k points)

Hi there,

As you know, this code points to an issue with a lean condition on bank 1. A vacuum leak will cause this. Here is some more info for you.

P0171 VOLKSWAGEN - System Too Lean Bank 1

Read more: https://www.autocodes.com/p0171_volkswagen.html

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