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| E46 General discussion and technical help for 1999-2004 3 series cars. |
05-08-2007, 10:41 AM
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#1
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Name: donniemac
Title: United Newb
Status: Offline
Join Date: May 2007
User not setup in Rate My Car. Click here to set it up. Your Ride: 2001 330 ci
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Service Engine Soon (OBD II) light
I am looking for some help. Since the new fuel formulations, I have heard of, and experienced myself on both a 2002 325 and a 2001 330, instances where the OBD II light comes on due to the higher alcohol (oxygentating agent) in premium grade gas. I have gone to the NHTSA site to check for TSBs but have not found any. The dealer who I have the most respect for is recommending alternating middle grade and premium to help with the issue. Does anyone know of a fix from BMW or if there is one in the works. I would think that a programing change would eliminate the failure code. Hopefully the new vehicles are not experiencing the same issues. Any input would be appreciated. |
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05-08-2007, 10:46 AM
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#2
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Name: Numark318i
Title: has an empty wallet
Status: Offline
Join Date: Apr 2005
Location: The Only place in the world where people say "Hella"
Your Ride: ^^
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what state do you live in?
In Ca a maximum on 10% ethanol can be put in gas? According to BMW( i remeber reading this somewhere) thats the most you can safely put in the gas?
as far as i know all grades of gas have the same amount of ethanol.
__________________
We all get the urge...Saturday early morning...nothing to do till noon...  BMW FTW
The aural sensations of 1st gear WOT 
**CGM **(Certified Garage Mechanic) 
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05-09-2007, 11:12 PM
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#3
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Name: donniemac
Title: United Newb
Status: Offline
Join Date: May 2007
User not setup in Rate My Car. Click here to set it up. Your Ride: 2001 330 ci
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Right now I live in Virginia, but the fill up was in SC that I got the light on. Filled up with mid grade and light went out after 50 miles. This is what I was told to expect from local BMW dealer ( a good dealer at that) and is exactly the same behavior as our 2002 325. I do believe it is due to the new gas formulation. Could be that California gas was already oxygenated and maybe what I need to do is to reset my computer and have it learn the new formula, or maybe there is a California program that will solve this issue. I am noticing a drop in fuel efficiency with the mid grade. don't seem to see a lost in power, at least by the seat of the pants, however good that is. What I also do not know is: If alcohol is used as an octane boost, does that count in the 10% ethanol?
That is what my BMW dealer is saying is happening, the alcohol used to boost the octane pushed premium over the 10% figure. |
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