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1,6,7,8 - Series and Mini Cooper General Chat related to models that do not fit into particular categories above. Please try to put your discussion in more appropriate sections. This section does cover the 1 Series, MINI Cooper and 8-Series vehicles: BMW 830i, BMW 840Ci, BMW 850i, BMW 850Ci, BMW 850CSi, M8, Alpina B12, BMW CS Concept and others.

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Old 05-12-2009, 11:05 PM   #1 (permalink)
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Exclamation p0171 and p0174 code help,,01 740i

2001 bmw 740i 4.4l

i have this 2 codes coming up p0171 and p0174

anyone have any advice what to check for ,,

i appreciate in advance,,,

thank you
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Old 05-13-2009, 06:03 AM   #2 (permalink)
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0171 & 0174

Mean that both banks are running lean.

You may have a vaccum leak or the o2 sensors are ageing or the PCV valve has gone.
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Old 05-13-2009, 08:31 AM   #3 (permalink)
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can it be from the maf sensor also?

the maf sensor plastic case was broken,,so i replace with a use one and left the maf sensor too,,,
maybe i should put the one from before back in maybe thats why,,dont know if this was the problem before,,i purchase the car demage,,not running..
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