P0171 P0174 System too lean(Bank 1 and 2)
#1
05-29-2013, 11:50 PM
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?
Recently replaced the MAS, it didn't help.
Probable causes?
Anyone knows how to check the O2 sensor?
Any suggestions?
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