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General E46 Forum
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Old 01-23-2009, 10:43 AM   #1
Cloin
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Join Date: Jul 2008
Location: Pittsburgh, PA
Posts: 39
My Ride: 2000 328i
Fuel Mix too Lean

hey all,

my check engine light came on and i had it looked at. o2 sensor is throwing a fuel mix too lean sensor. mechanic said it only threw it once and reset it for me and said we would worry about it if it happened again. what might cause that and what would be the fix.

thanks for the info.
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Old 01-23-2009, 01:14 PM   #2
cheech320
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Join Date: Jun 2005
Location: Toronto
Posts: 279
My Ride: Is TiAg
You should chech for any rips or cuts in the intake boots that are after the maf sensor. If there is any way for air to get into those you will get a lean fuel situation. Check those first since thier the easiest to replace and most cost effective.
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