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P0171 P0174 System too lean(Bank 1 and 2)

Audi A8 This full sized Audi A8 sedan offers interior luxury and spaciousness comparable to any car in the full sized luxury sedan class

P0171 P0174 System too lean(Bank 1 and 2)

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Old 05-29-2013, 11:50 PM
1st Gear
Thread Starter
Join Date: May 2013
Posts: 3
Default P0171 P0174 System too lean(Bank 1 and 2)

Got a 2007 A8 with 67K.
Recently replaced the MAS, it didn't help.
Probable causes?
Anyone knows how to check the O2 sensor?
Any suggestions?
 
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