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Old 06-22-2013, 10:11 PM   #1
Noxas
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bmw 2002 325xi; car goes into limp mode?

Hi i was wondering if anyone else had this problem. Just cruising along and out of no where the EML, ABS, traction control, Engine service light, Brake pads and hand brake light all go off and the car. Car is pretty much in limp mode until i restart it and even then problem will reoccur. I did an OB2 check and the errors given were P0313 P1500 P0175 P0172. Although this does nothing for me since ive never done an OB2 check on a car before.

anyone happen to have this problem and know what it is?

Thanks
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Old 06-23-2013, 07:30 AM   #2
Quickid
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Check the intake boot for cracks and tears and check for stuck idle control valve.

Last edited by Quickid; 06-23-2013 at 07:35 AM.
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Old 06-24-2013, 11:18 PM   #3
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Thanks; i was assuming that too. going to do a check and update!
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Old 07-02-2013, 09:34 AM   #4
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Checked hoses and even cleaned out the idle control valve; which was filthy. Problem still occurring. After awhile of driving the rear wheels feel like they're rumbling while accelerating. Going to redo an obd check when I get the chance but unfortunately problem is still not resolved.

Any other guesses?
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Old 07-22-2013, 04:56 PM   #5
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Update: changed the icv. Also cleaned maf sensor and electrical plugs. Errors still pop up as well as a new error. P1512. Checked the disa and it seems to be holding pressure. Also cleaned that electrical unit as well. Honestly at a stump; brought it into one mechanic and they said it should be the icv.
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Old 07-22-2013, 05:39 PM   #6
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Get the codes read by a BMW computer. Based on the Xmas lights on the dash it could be transfer case related.
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Old 07-22-2013, 09:57 PM   #7
Noxas
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Would the bmw computer really be able to pinpoint it like that? I've used three obd2 scanners. One china made one; one where I've hooked into my laptop; and one that gave a full detailed report on all the errors the car ever had.
Another mechanic said it was probably the idle control valve but now I'm at a complete stump
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Old 07-22-2013, 10:01 PM   #8
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What software was the laptop running? BMW INPA? The BMW software can give you more info than just the standard OBDII stuff.
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Old 07-22-2013, 10:30 PM   #9
Noxas
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no; it was a generic obd2 reader. Used for other cars aside from just bmw. I went to Lakeshore motors for their obd2 read in which essentially i got the same results. Mechanic over there said it was more then likely the ICV; and that the other errors were caused from that. Going to just bring it straight into bmw and get a second opinion.
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Old 07-22-2013, 11:04 PM   #10
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I would go somewhere like RMP and not the stealership.
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Old 07-22-2013, 11:45 PM   #11
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Europa motors any good?
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Old 07-23-2013, 12:16 AM   #12
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The ICV will NOT give any codes, the engine will just die...Or have bad idle.

Sounds like a low voltage situation...When alternator goes, it will set off A LOT of codes, including ABS ASC/DSC transmission, radio malfunctions etc...

The MAF can also cause some of this...
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Old 07-23-2013, 01:22 AM   #13
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Quote:
Originally Posted by Eurostyle View Post
The ICV will NOT give any codes, the engine will just die...Or have bad idle.

Sounds like a low voltage situation...When alternator goes, it will set off A LOT of codes, including ABS ASC/DSC transmission, radio malfunctions etc...

The MAF can also cause some of this...
I was thinking the same thing. Alternator i believe is fine however; but the battery is getting a voltage of under 13; it was also reading 95%. I put a charger on it and it hit 100% with a voltage of 15. Left it off for the night and returned and battery was back down to 95% and and voltage under 13. The battery is also still the stock battery.

I was also thinking MAF sensor but there is no idle problem at all. Not until it is in limp mode; and even then its pretty sparotic. Sometimes it just runs as if its in limp mode and sometimes it feels like the car is ready to stall at any moment.

I will however check both.

Is there any way to check if the MAF sensor is ok?? Volt meter?
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Old 07-23-2013, 05:33 PM   #14
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Changed the battery as voltage was fairly low for what it should have been. As I was doing an in dash check/ revving I heard a weird sucking noise.
http://youtu.be/onLHZTnDd0M

Anyone happen to know what this is??

Thanks
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Old 07-23-2013, 06:05 PM   #15
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That sucking noise is just the air going past your throttle.
You can also hear it in this video.
http://www.youtube.com/watch?v=-bnmL94K2hE

It did sound like your engine was stalling near the end of the video. Sounded like the throttle was fluttering. Have you checked your intake tubes for cracks/leaks? The lower elbow just before the throttle fails every 60,000km. There are also dozens of other sources of vacuum leaks.

Another big common issue is the CCV crank case ventilation system. It fails, causing all sorts of problems. That should be replaced every 140,000km at least.
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