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X3 E83 (2004 - 2010)
Talk about the E83 BMW X3 in this forum!

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  #1  
Old 04-06-2011, 05:27 PM
BLNDINABMW BLNDINABMW is offline
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Angry 2004 X3 2.5i CHECK ENGINE SOON LIGHT ON AT 82,000

Hello,

My baby, my 2004 X3 2.5i CHECK ENGINE SOON LIGHT is on at 82,000. Its freshly out of warranty and I am for the first time taking it to an independent mechanic. We have replaced the thermostat, spark plugs, and done a Service 1 on the car. However, in the morning when I turn it on the rpm meter pulsates up and down and my Check engine soon light keeps coming back on. At one point they were telling me I had a bad tank of gas, I ALWAYS put premium in it, and that the car was difficult to diagnose. Now the light is on again and Im curious if anyone else has had this problem and if this is the beginning of a downward spiral for my baby... Any and all help I would appreciate!

Thank you!
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  #2  
Old 04-06-2011, 06:34 PM
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mlukas161 mlukas161 is offline
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Could be a number of things. Check for a loose gas cap first as its free. Other possibilities are: plugged CCV, broken DISA flap, cracked rubber air intake boot, bad vanos.

Have the OBD scanned and see what codes are thrown.

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  #3  
Old 04-07-2011, 07:50 AM
UncleJ UncleJ is offline
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All of the above. I had a CEL in my '06 at 65k miles. Turned out (after two shop visits) to be a MAS that did not function properly all the time. The first time they replaced a fuel return valve in the tank and that fixed the light, but in a week the CEL went back on and after a few days of checking it out (i.e. sitting in the back lot getting a sun tan) the tech finally found the MAS was not functioning properly all the time. The good news is I had a nice '11 328 to swan around in and made some nice trips up to the wine country in it. I did miss the X3 driving height though and was happy to get it back! All is well so far and as a benefit I am getting better mileage now too.

Last edited by UncleJ; 04-08-2011 at 07:11 AM.
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  #4  
Old 04-07-2011, 12:54 PM
BLNDINABMW BLNDINABMW is offline
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Eeek... I feel like the computer keeps telling them different things. They did admit that it is hard to diagnose. First the thermostat, then a bad tank of gas and now there is some sort efficiency error that is coming up. They did mention the return valve in the tank being something that normally goes bad at this mileage....Does anyone know what is normal repairs for the X3 at 82,000?
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  #5  
Old 04-08-2011, 07:14 AM
UncleJ UncleJ is offline
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Ask them to check the MAS for intermittent failure. For some reason mine worked part of the time and was hard to check. This part has been reported as a problem in the past on the boards here. Unfortunately it is NOT covered under the CA extended emissions warranty (either is the tank valve) so you get to pay for it!
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  #6  
Old 04-08-2011, 07:05 PM
BLNDINABMW BLNDINABMW is offline
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Im at a new shop, that could do a full diagnostics check (things I never knew I had to ask) and it looks like its a Crank Key Ventilation System problem. I have a major vacuums leak/intake leak apparently these break down often on X3 between 70,000 to 90,000. And they are expensive!!!! $900!!!

There goes my fun money
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  #7  
Old 04-08-2011, 07:54 PM
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mlukas161 mlukas161 is offline
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That's a pretty high price. Parts are around 150 bucks. It's a difficult DIY from what I hear though.4-5 hours possibly. Still seems like it should cost closer to 500 max at an indy. Just my opinion.

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  #8  
Old 04-09-2011, 11:23 AM
Supercourse Supercourse is offline
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Quote:
Originally Posted by BLNDINABMW View Post
... it looks like its a Crank Key Ventilation System problem. I have a major vacuums leak/intake leak apparently these break down often on X3 between 70,000 to 90,000.
Often discussed on other forums, especially X5 ones, or any BMW forum for that matter.
Even Volvo forums.

From what I can gather, the hoses of the CCV valve (a.k.a. oil separator or cyclone valve) do soften with age and/or mileage.
Around about 70K-90K sounds right.

Even checking the hoses is not an easy DIY task, let alone replacing them.

But unless some other things are happening at the same time, it is not really necessary to replace them.

The other clues to (routinely) look out for are:
- evidence of a mayonnaise type deposit on the underside of the oil filler cap
- vehicle normally kept outside or in a carport
- letting the engine idle to warm it up
- using the car for short commutes without any faster long runs in between
- oil change interval not consistent with vehicle usage

In freezing weather, the effect of a clogged oil separator can get magnified when the water in suspension freezes, with several undesirable consequences likely:
- splitting of the worn hoses
- engine ingests oil
- engine gets effectively hydrolocked

That shouldn't be a problem in L.A., but a failed CCV system still needs to be replaced.
Usually, this throws a SES light.
Estimated time for the job seems to be in the range of 2.5 to 5 hours,
and parts are between $130-$300 depending on where they are sourced from.
So anywhere between $400 and over $1K has been reported.
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  #9  
Old 04-09-2011, 11:39 AM
THK THK is offline
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Without the codes this thread is useless.
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  #10  
Old 04-09-2011, 01:21 PM
BLNDINABMW BLNDINABMW is offline
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THK - I totally disagree with you, Supercourse just explained everything that was going on with my car. Ive never had an X3 before and its good to know that other people are having the same problems and that my INDY mechanic is not taking me for a ride on price and repairs. The more I know the better I feel about the people I allow to take care of my car and also the better for me and how I treat it.

Thank you supercourse! I wasn't able to find the information you were talking about on the boards. I will try some new search key words and see if there is more for me to learn!
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  #11  
Old 04-09-2011, 04:54 PM
chrisk03 chrisk03 is offline
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WHAT are the SES codes? Was the light flashing or staying on all the time? We just had our 2004 X3 2.5i show the Service Engine Soon light come on and went to Autozone and had the codes pulled for free. The two codes were p0171 and p0174: bank 1 and 2 running lean...potential vacuum leak. This is COMMON (supposedly) on the X3 and more than likely is the Intake boot is ripped. See if you can shine a flashlight down the back of the intake boot and notice a rip. Even if you can't, I'm betting dollars to donuts it is the boot if you are running lean and have a vacuum leak.

Now, part is around $50 bucks at BMW...with my BMWCCA discount. I watched my buddy (mechanic) change it out today and it is not simple as an oil change but can be done relatively easy by a mechanic with all the right tools. I don't have a pic, but the boot was torn. He replaced and the light is now off and car running normal. Try this first and don't spend $900 bucks. It will probably cost you around $200-250 at an Indy because of labor (2 hours-ish)...BMW really has it tucked in there and you have to remove multiple things to get a clear shot...again, not hard, but time consuming. I will be shocked if it's not this part and changing this doesn't fix your issue, BUT you really need to get the codes pulled. Again, Autozone or Pep Boys will pull the codes for FREE...at least they do here in PA.

Last edited by chrisk03; 04-09-2011 at 04:57 PM.
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  #12  
Old 04-09-2011, 08:13 PM
THK THK is offline
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Quote:
Originally Posted by BLNDINABMW View Post
THK - I totally disagree with you, Supercourse just explained everything that was going on with my car. Ive never had an X3 before and its good to know that other people are having the same problems and that my INDY mechanic is not taking me for a ride on price and repairs. The more I know the better I feel about the people I allow to take care of my car and also the better for me and how I treat it.

Thank you supercourse! I wasn't able to find the information you were talking about on the boards. I will try some new search key words and see if there is more for me to learn!
The thing you fail to understand, there are several hundred codes in the OBDII system, with out the codes to lead you to a componet or system, everything then is a guess.

I am always amazed by members of this forum (no disrespect intended) and other BMW forums, the guess work and the wasted dollars spent in trying to correct a problem. Any compentent mechanic will start with what codes are in the system and then pinpoint the problem then inform the customer. That is how we did it at my shop.

Yes, I agree there are common items that fail on any car but with out the codes the CPU is storing, this thread is nothing but a guess.

If you do not trust your INDY or Dealership, go somewhere else to some one you trust or boardmembers have recommended.

The first thing you gotta do is get the codes!!!

Last edited by THK; 04-09-2011 at 08:15 PM.
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  #13  
Old 04-09-2011, 08:36 PM
THK THK is offline
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This mighthelp to put thing in perspective.

http://www.xtranormal.com/watch/7452...c-the-customer
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  #14  
Old 04-10-2011, 10:03 AM
chrisk03 chrisk03 is offline
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Quote:
Originally Posted by THK View Post
This mighthelp to put thing in perspective.

http://www.xtranormal.com/watch/7452...c-the-customer
That's friggin great, THK...and must admit, I used to be like that, somewhat, until a couple of friends became mechanics. Cars these days are really very sophisticated and even with help from codes, it can often be multiple things.

To the OP. It would really behoove you to get the code(s) checked FIRST, so you know exactly what to tell the mechanic. This will save you money in the long run and probably have your car back on the road more quickly. Sorry to beat a dead horse, but THK is right on with his advice. Good luck.
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  #15  
Old 04-18-2011, 06:28 AM
OwnerBMW OwnerBMW is offline
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Same Problem

The SES light on my 2004 325 has been coming on for three years showing that it's running lean. I've spent a fortune and am at my wits end. My independent BMW specialist replaced the MAF sensor, performed Inspection II, replaced both pre-cat oxygen sensors, and replaced the MAF sensor again. I gave up and went to the dealer which replaced the crankcase vent valve and hoses and then replaced the fuel pump. Yesterday, the SES came on again.
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  #16  
Old 06-04-2011, 12:02 PM
cactusboy53 cactusboy53 is offline
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2006 BMW X3 w/ less than 70K. BMW service expired last year. I just did oil service and did a look see at all fluids, brakes, etc. No wrecks/damage & a good driver.

3 weeks after service, SERVICE ENGINE SOON light came on. Code reader shows: P2430; Secondary Air Injection System. X3 runs fine. I cleared code, and it returned in a couple of days.

I haven't seen anything here regarding this code. I found a generic diagnostics that mentions inspecting the harness / connector between pressure sensor & ECM. A little over my head.

Thanks for any input.
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  #17  
Old 06-04-2011, 02:14 PM
Supercourse Supercourse is offline
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Don't think we have had reports of that particular code with the secondary air pump.

At least it is quite accessible, up high on the pax side of the engine.

Posts #5 & 6 here might help:
http://www.bimmerfest.com/forums/sho...d.php?t=426199

But if it really is a signal detection issue rather than vacuum or mechanical, might be hard to diagnose.
Check any wiring in that area for exhaust heat damage?
Or some oil spilled down there during the last service?
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  #18  
Old 06-10-2011, 07:29 PM
cactusboy53 cactusboy53 is offline
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Quote:
Originally Posted by Supercourse View Post
Don't think we have had reports of that particular code with the secondary air pump.

At least it is quite accessible, up high on the pax side of the engine.

Posts #5 & 6 here might help:
http://www.bimmerfest.com/forums/sho...d.php?t=426199

But if it really is a signal detection issue rather than vacuum or mechanical, might be hard to diagnose.
Check any wiring in that area for exhaust heat damage?
Or some oil spilled down there during the last service?
According to BavAuto, the P2430 code is from a "Mass Air Flow Sensor". BavAuto recommends that I make sure the connector is properly seated. If not, sensor is just under $100.

Any ideas where exactly I would find this MAF sensor under the hood of the '06 X3?

Thanks!
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  #19  
Old 03-04-2017, 03:38 PM
New2bimmerAD New2bimmerAD is offline
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X3

P0174 bank 2
P0171 bank 1

Miles 124804

Any referrals for mechanics near mango Fl
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  #20  
Old 03-04-2017, 04:10 PM
swampX3 swampX3 is offline
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0171 and 4 ...lean code basics for your M54 engine

>most often a simple vacuum leak...best wishes

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  #21  
Old 03-04-2017, 04:15 PM
swampX3 swampX3 is offline
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your engine in a saloon ...same X3 techniques for a lean codes fix

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  #22  
Old 03-05-2017, 11:04 AM
swampX3 swampX3 is offline
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baby mass air flow sensor info

>some folks confuse it with the main mass air flow sensor on the intake manifold after the air cleaner

>your secondary air mass airflow sensor works in the same way as its big brother on the intake.....it simply tells the computer how many pounds of air are being sucked into the secondary air pump and sent to the exhaust side of the engine.....you can see the little guy in these image files ....he lives in the secondary air pump suction and is usually simply clamped on with a hose clamp ....very easy to swap but you should clean it first to see if it will bounce back to life....the image files show some good cleaner

https://www.google.com/search?q=2006...EYYkuD6sKahiM:
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  #23  
Old 03-05-2017, 11:08 AM
swampX3 swampX3 is offline
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secondary air mass airflow sensor and its filter

>parts 15 and 16.....don't forget to check the filter is nice and clean

>put the last seven of your VIN into realoem.com and double check your exact model setup

>here is a generic 2004-06 X3 example link

http://www.realoem.com/bmw/enUS/show...diagId=11_3558
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  #24  
Old 03-05-2017, 11:10 AM
swampX3 swampX3 is offline
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links for cleaning air flow sensors

https://www.google.com/search?client...UTF-8&oe=UTF-8
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  #25  
Old 03-11-2017, 03:13 PM
jlex jlex is offline
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Quote:
Originally Posted by OwnerBMW View Post
The SES light on my 2004 325 has been coming on for three years showing that it's running lean. I've spent a fortune and am at my wits end. My independent BMW specialist replaced the MAF sensor, performed Inspection II, replaced both pre-cat oxygen sensors, and replaced the MAF sensor again. I gave up and went to the dealer which replaced the crankcase vent valve and hoses and then replaced the fuel pump. Yesterday, the SES came on again.
Have any of the shops done a smoke test on the engine to see where the leak may be? Sounds like they're guessing and just throwing parts at it. Found my leaky intake manifold gasket and replaced it after doing a smoke test. Cured my SES lights...
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