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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 05-12-2013, 12:14 PM   #1
BLACK E46 SMOKE
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Unhappy Obd codes p1347 p1342 p0300 p1344

Today my 2001 BMW 330xi threw codes P0300 P1347 P1342 P1344. About 2 years ago I changed all spark plugs, one fuel pump and MAF sensor. Last wednesday I changed 2 coils. I need to go for inspection. Does anyone know how to fix these codes or what to check?
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Old 05-12-2013, 12:39 PM   #2
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Quote:
Originally Posted by BLACK E46 SMOKE View Post
Today my 2001 BMW 330xi threw codes P0300 P1347 P1342 P1344. About 2 years ago I changed all spark plugs, one fuel pump and MAF sensor. Last wednesday I changed 2 coils. I need to go for inspection. Does anyone know how to fix these codes or what to check?
my guess is you need:
http://www.ecstuning.com/BMW-E46-325...tor/ES2603146/

don't go aftermarket, only OEM bmw on this part.
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Old 05-12-2013, 12:46 PM   #3
BLACK E46 SMOKE
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Is that OEM or are you just showing me what I need? And please explain why you believe this is what I need. Thanks.
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Old 05-12-2013, 12:48 PM   #4
BLACK E46 SMOKE
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That part says 325 xi I have a 330 xi.
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Old 05-13-2013, 10:16 AM   #5
SamDoe1
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Originally Posted by redbull 325is View Post
my guess is you need:
http://www.ecstuning.com/BMW-E46-325...tor/ES2603146/

don't go aftermarket, only OEM bmw on this part.
^ Agree.

Quote:
Originally Posted by BLACK E46 SMOKE View Post
Is that OEM or are you just showing me what I need? And please explain why you believe this is what I need. Thanks.
What he suggested is an OEM part/kit that is required to change your oil separator. The oil separator takes the oil vapor out of the crank case and dumps it back into the oil pan where it can condense and the air from that vapor gets dumped into the intake. It uses those tubes to do that task. What's likely (internet diagnosis) is that one of those tubes is likely clogged and has caused the separator itself to fail. When this happens, the separator can no longer take the oil vapor out and just dumps oil vapor into the intake causing your misfires.

One sure fire way to diagnose a failed oil separator is to start the car, open the hood, and take off the oil fill cap. If the separator is toast, the car will start making really strange sounds when you take the cap off. If the unit is ok still but one of the hoses is clogged, then the car won't make any strange sounds. If this is the case, you probably only need a hose but it's just a matter of time before the unit itself goes. There are youtube videos out there to show the sounds and how to perform the diagnosis in detail.

Another good thing to do is to pull a few plugs out and check for oil on them.

Hope this helps, good luck!

Oh and same part for 325 and 330.

Last edited by SamDoe1; 05-13-2013 at 10:18 AM.
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