A4 (B8 Platform) Discussion Discussion forum for the B8 Audi A4 produced from 2008.5

P0171 error

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Old 10-04-2012, 09:07 AM
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dk1
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Default P0171 error

My 2009 had check engine light come on with this error code. "P0171 System too lean". Before I have to go for an out of warranty trip to the dealership are there any common things I can check for B8? I hear that can be any number of things, some quite trivial.
Old 10-12-2012, 06:30 AM
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dk1
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Anybody?

To test PCV I pulled the oil cap off with the engine running and there is some suction but not enough to make it difficult to remove the cap. From what I know the PCV valve is functioning properly.

I reset the code and the check engine light did not come back - it's been about 300 miles of driving.

Anything I should worry about?
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