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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 10-14-2008, 07:16 PM   #1
faescl
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Join Date: Sep 2008
Location: Massachusetts
Posts: 62
My Ride: BMW 330xi
MAF Sensor Location? P1500, PO172 & PO175 Codes?

OK... I am new and not a real DIY guy. I need to know where the MAF is located in my 03 330xi? I received advice on this site based on a trouble code (P1500). I was told to clean my MAF sensor.

I also received codes PO175 and PO172. Various opinions on this site. I would like to see if it is a DIY project. Any ideas would/suggestions/directions/ would be appreciated.

No power/acceleration problems and the vehicle runs fine although my mileage dipped a hair (25.3 MPG to 25.1 MPG....almost always highway). It starts fine, runs smooth and does not lose any power or stall.

Last edited by faescl; 10-14-2008 at 07:17 PM. Reason: typo
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Old 10-15-2008, 09:28 AM   #2
Lbert
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Join Date: Oct 2006
Location: Richardson, TX
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My Ride: 325i
The MAF sensor unit is in between your air filter box and throttle body. The part you clean is a very fine wire so be very gentle.
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Old 10-15-2008, 07:51 PM   #3
faescl
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Join Date: Sep 2008
Location: Massachusetts
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My Ride: BMW 330xi
Post I also received codes PO175 and PO172.

Any ideas on these codes. I believe the codes say that the car is running to lean or rich. Since it does not have any power loss, I would hazard to say that it is running too rich. The codes came from Advance Auto Parts......

Suggestions on a repair or an opinion?

Thanks,
Cesar
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Old 10-15-2008, 08:18 PM   #4
Dan99
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Check out my thread:
http://forum.e46fanatics.com/showthr...774&highlight=
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