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Girlfriend's A4 Several DTC Codes

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Old 12-21-2014, 11:45 PM
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Default Girlfriend's A4 Several DTC Codes

My girlfriend has a 2007 A4 2.0T with ~94k miles. Bought it used in May of this year (Drive Time). Recently started having issues with it. A steady CEL came on about a week ago. Used this http://www.nemisysotc.com/ scanner to read the CEL:
P0171B, P0300B, P0301B, P0302, P0303, P0304B, P0507
And pending code P0171B. After the car warms up, it begins to rough idle and has been getting worse. That's about the only symptom it's showing. Goes away during normal driving and acceleration. Dealer once told her she NEEDED the vacuum pump replaced (and other stuff) for close to $1,000 (!!!!!). Where do I start?
Old 12-23-2014, 02:46 PM
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Has the PCV valve been replaced?
Old 12-27-2014, 03:47 PM
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Sounds like a crankcase breather valve that is not connected properly. Try making sure it is placed correctly in the place it belongs to...
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