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Old 02-08-2011, 10:02 PM   #1
phuong31190
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Join Date: May 2010
Location: Portland
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P0155 code please help???

So the Service Engine Soon light turns on on my car today and I got it scan and it gave me the P0155 code error. I know the issue is due to the O2 censor, and can anyone have the same issue tell me what parts # should I buy to replace it. Thanks very much everyone.

PS, I know some people will tell me to do the research, but I already did and honestly, did not find any really things helpful.
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Old 02-08-2011, 10:29 PM   #2
phuong31190
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Sorry ! forgot to mention, my car is 2002 325i automatic transmission! Thanks for your help....https://forum.e46fanatics.com/images/...s/thinkerg.gif
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Old 02-08-2011, 11:16 PM   #3
beef1020
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Sounds like it's a pre-cat O2 sensor, have you noticed a decrease in fuel economy at all? The pre-cat is sensor #1 in the picture:

http://realoem.com/bmw/showparts.do?...81&hg=11&fg=50

You should be able to get it cheaper then that. I have also seen people get bosch O2 sensors on amazon.com, although I am not sure how that works out.

http://www.amazon.com/Bosch-13477-Ox...ar=1&carId=001

Also checked out some of the parts places real quick and found this:

http://www.turnermotorsport.com/p-29...-x5-z3-z4.aspx

quick edit, I did all this assuming you had a 323, not sure if the 325 is different and you should be able to figure it out based on what I posted already...

Last edited by beef1020; 02-08-2011 at 11:19 PM.
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Old 02-08-2011, 11:32 PM   #4
phuong31190
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Thanks for your help! I will go to the Autopart store tomorrow to check if it's available or not!
Btw, my car is 2002 325i
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Old 02-08-2011, 11:40 PM   #5
beef1020
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Quote:
Originally Posted by phuong31190 View Post
Thanks for your help! I will go to the Autopart store tomorrow to check if it's available or not!
Btw, my car is 2002 325i
Be careful with aftermarket sensors, I have no experience with O2, but I know with others like camshaft aftermarket is horrible. I would really advise to at least get bosch.
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Old 03-27-2011, 10:51 PM   #6
eyedrunk
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Is anybody having problems with the ambient temperature not being correct after changing the O2 Sensor? Mine seems to be off by 5 - 15 degrees most of the time.
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