Last post on Nov 29, 2013 at 2:06 PM
You are in the BMW 3-Series
What is this discussion about?
BMW 3 Series, Sedan
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#3798 of 5378 service engine light
Mar 10, 2008 (1:46 pm)
2001 330Ci w/135K miles...
My service engine soon light came on. I took the car to Autozone to have the code read. It came back with a lean condition in bank #2. The guy there told me that this code usually means one or more O2 sensors need replacing. Since BMW calls for O2 sensors to be replaced at 100K miles and mine are still the originals, I have no problem replacing them all and have already ordered them from Bavauto.com. However, the printout from AutoZone also lists MAF sensor as a possibility.
Looking through the Bentley manual, there are codes specific for O2 sensors. My questions are:
If the problem is really with the O2 sensors, why wouldn't the more specific code have come up?
Would BMW shop's OBDII reader give a more specific code than a generic reader from AutoZone?
Is there any other way to pinpoint exactly what the problem is when faced with a fairly vague reading?
Again, based on the milage of the car and the lack of $$ put into fixing things so far, I have no issue shelling out the gappy to fix whatever, but on the flip side, I have no desire to spend my money unnecessarily either.
#3799 of 5378 Re: service engine light [kominsky]
Mar 10, 2008 (2:09 pm)
The indie shop where I take my Jeep has a Snap On code reader and it couldn't trap the code that was throwing a CEL in my Mazdaspeed. If I were you I'd get a second opinion from a dealer or a good BMW indie shop. That said, if you are planning to hold on to the car for a while it sure wouldn't hurt to change out the O2 sensors.
#3800 of 5378 Re: My BMW will not start on occassion [sunilb]
Mar 11, 2008 (9:57 am)
I didn't think so at first because it would start 10-20 minutes later and the lights and radio came on when it wouldn't start. However, I'm now noticing the fan making a strange noise as if it gets stronger then weaker while the car is running. I'm guessing that is battery/electrically related.
#3801 of 5378 Re: My BMW will not start on occassion [widriver2]
Mar 11, 2008 (8:48 pm)
I had a similar problem like yours and it turned out to be a faulty electronic key. The next time it happens immediately try your other remote key and if it cranks up. If not than it sounds like a starter issue.
#3802 of 5378 Re: My BMW will not start on occassion [tnguyen74]
Mar 12, 2008 (3:20 am)
Excellent post! I never thought of that! I hope it helps this poster!
#3803 of 5378 Re: service engine light [roadburner]
Mar 12, 2008 (10:03 am)
Last night I popped the hood to check fluids and noticed that my oil filler cap was missing. I changed the oil 2 weekends ago, about 2 days before the service engine light came on.
Initially I didn't put the two events together, but do you guys think that a missing oil cap could cause a lean condition? Something with the crankcase venting? I'm well beyond my automotive knowledge here and merely guessing... please be kind if I'm way off base!
Oh, btw, I'm not sure how yet, but I'm positive I will come up with a way to blame my wife for the missing filler cap.
#3804 of 5378 Re: service engine light [kominsky]
Mar 12, 2008 (10:40 am)
Yup, no doubt about it, a missing oil can can and most likely will cause a lean condition. Uhhh, does wifey know the storm that's headed her way.
#3805 of 5378 Re: service engine light [shipo]
Mar 12, 2008 (12:02 pm)
Nice... that's what I was hoping to hear. Thanks!
As for the wife, I will not blame her to her face since she'll know it's a lie and likely attack. I just need something to tell the guys so I can retain my ~cool~ factor.
#3806 of 5378 BMW 325xi 2004 maintenance!
Mar 15, 2008 (8:53 am)
Hello Guys! I have been reading all the posting on this site and I'm very happy that I joined in because it keeps me informed about my car. I have a 325xi '04 with 61,000+ miles on it, I owned the car now and It will be 4 yrs this may '08. I am aware that my 4 yr-service included with my purchase is already done. This is my dilemma, I went to one of the dealership 7 months ago for a regular maintenance/check up as per my indicator on my computer on the dashboard. So the service specialist told me that my car is due for a 14 pt inspection/check and I ask him how much it is, he told me it's going to be $750 for the check, I was a little shock and I just opted for a change oil. I needed an advice for my next service appt due approx. 6 months if I really needed the major inspection or I can just find a good mechanic to check my car. I am planning to keep my car and so far no major problem experienced! Thanks !!!
#3807 of 5378 Disable a service light
Mar 15, 2008 (9:21 am)
I have a 2001 325CI w/ 25K. Dealer diagnosed bad PCV & secondary pump light. Can't afford the $1500 the service dept wants to fix. I heard that you can "short out the light". My question: Anybody know how to "short-out" the lite or easy way to fix w/o taping over the light??