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General E46 Forum
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Old 06-03-2013, 10:57 AM   #1
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Join Date: Mar 2013
Location: South Carolina
Posts: 24
My Ride: 2003 BMW 330ci
Possible MAF issue

I have recently been having problems with my 2003 330ci. It seemed to be a transmission issue, as the car seemed to be slipping between shifts, but I took it to a transmission shop, and they told me that the transmission was fine.

The car has been shooting codes for a while now, and they all seem to relate to fuel banks and MAF sensor problems.
- Fuel trim bank 1, permissible range exceeded
- Fuel trim bank 2, permissible range exceeded
- Fuel trim bank 1 control limit
- Fuel trim bank 2 control limit
- Misfire, cylinder 6
- Signal, air - mass flow sensor

It also stalled on me while idling (in a parking lot, thankfully). I am wondering if anyone has suggestions as to what this might be, or if anyone else has experienced anything like this.
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Old 06-04-2013, 10:38 AM   #2
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Join Date: Apr 2003
Location: Haverhill, MA
Posts: 3,323
My Ride: 2001 330CI
Unplug the MAF and see what it does.

Last edited by hummer; 06-04-2013 at 10:38 AM.
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Old 06-04-2013, 10:42 AM   #3
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Join Date: Dec 2012
Location: FL
Posts: 2,791
My Ride: 325Ci
Clean it
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fuel trim, mass air flow sensor, misfire, stalling, transmission

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