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3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

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Old 11-28-2008, 01:19 PM   #1 (permalink)
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Check engine light on...Help!

Hey guys i just purchased a 2003 330CI and my cel light has come on. These two codes are popping up in the OBDII scanner- PO171 and PO174. I also hear a sucking sound 5 seconds after i shut the car off coming from around the MAF Hose. I also hear a hissing noise coming from the back rear right of the car when it is turned on. I have included two pictures below that show a hose ( im unsure what this hose is for and what it connects to?) thats connected to to MAF hose and it is cut in two places indicated by the red circles i have drawn. Please help!
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Old 11-28-2008, 01:49 PM   #2 (permalink)
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You need to replace that hose, that easy as its letting it to much air.
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Old 01-02-2009, 05:48 PM   #3 (permalink)
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isnt that the air inlet silencer and does it need to be attached cause mine is off
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Old 01-03-2009, 08:16 AM   #4 (permalink)
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That looks like an electrical duct to me, are you sure its a hose???
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