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General E46 Forum
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Old 03-28-2014, 06:55 AM   #1
spencerkerdock
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2002 325i Problem

Okay so I've got an 02 325i that I love. But I was driving the other day and I quickly slammed the petal to the metal and the car seemed to stall out. I had to pull over and restart the car. The EML light has been on for a week or two but is it something major? Click image for larger version

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Old 03-28-2014, 08:02 AM   #2
pauly99
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What do the codes say? Without codes you may as well flip a 300 sided coin. Throttle plate? Fuel Filter?
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Old 03-28-2014, 08:06 AM   #3
spencerkerdock
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Code? Sorry I'm not much expert.


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Old 03-28-2014, 08:18 AM   #4
pauly99
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Where do you live? In my town, the local Autozone would pull codes for me for free. Basically the codes start to tell you what may be wrong with your car. They can point to a vacuum, fuel, electrical problem, etc....

I have an '02 325i as well. I bought the following device and combined it with the Torque App for Android (I can use with the smartphone or on my Nexus 7) to read codes.

http://www.ebay.com/itm/V1-5-ELM327-...E:L:OC:US:3160
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Old 03-28-2014, 08:20 AM   #5
spencerkerdock
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Charleston, SC, but thanks. I'll make sure to make a trip there this weekend.


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Old 03-28-2014, 08:21 AM   #6
fedeuruagu
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Go to autozone and ask them to read the codes from your car. It's free... don't listen to their recommendations because no one knows what they are doing there. Just write down the codes and post them here. Codes will begin with the letter P followed by 4 numbers. Google obd2 codes so you have an understanding of what it is.
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Old 03-28-2014, 08:41 AM   #7
pauly99
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A for instance is I would start my car in the morning and it would stall. I'm not positive about what codes the device gave me but it was something like P0491 and P0492. What I found was the secondary air pump hose was split in two. I replaced the hose, the car started fine, and the codes disappeared when I hooked the OBD2 sensor back up to the car.
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Old 03-28-2014, 09:02 AM   #8
spencerkerdock
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It's not starting the car but it's when you slam onto the gas and for a second it doesn't respond and seems to stall out


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Old 03-28-2014, 09:05 AM   #9
NumbaOneNewb
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If it's your eml light, it's your maf sensor. Does your car drive like normal now? And/or drive fine if you turn it off and start it back up? Also if it happens again, try disconnecting the maf sensor connector and drive for a couple of days and see if it ever shows back up
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Old 03-28-2014, 09:06 AM   #10
spencerkerdock
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What exactly is the maf sensor?


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Old 03-28-2014, 09:29 AM   #11
pauly99
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Mass Air Flow Sensor = MAF. Look it up online and you will find where it is on your car. Just off the air box. As part of normal maintenance, I bought MAF cleaner and lightly sprayed the sensor after taking the unit off.

You should do some searching on this forum as I'm sure folks have talked about the MAF 1000 times. Here is a video if this shows up. If not, Google 2002 bmw maf clean

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Old 03-30-2014, 11:52 AM   #12
spencerkerdock
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Ok got the code...it's P0221


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Old 03-30-2014, 12:11 PM   #13
jdstrickland
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Quote:
Originally Posted by spencerkerdock View Post
Ok got the code...it's P0221


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If the car is running fine, then you floored it to fast and confused the computer.

Do a Google search on P0221, then read some of the hits.
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Old 03-30-2014, 07:59 PM   #14
pauly99
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For instance: P0221 - OBD-II Trouble Code
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