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-   -   AWD and DSC malfunction, Engine malfunction, DBC malfunction (https://xoutpost.com/bmw-sav-forums/x5-e70-forum/93624-awd-dsc-malfunction-engine-malfunction-dbc-malfunction.html)

gregg3gs 08-03-2013 05:59 PM

AWD and DSC malfunction, Engine malfunction, DBC malfunction
WTF. (UPDATE bellow)

2008 x5 4.8 with 85k on the clock.

Does any one know if my transmission is failing?

On a way to work driving the x5 and then system malfunction pops up, and car is not drivable.
Why would engine malfunction follow AWD and DTC malfunction?

It happened last week and I had a local BMW mechanic take a look at it.
Since all modules needed a Firmware Upgrade all they were able to do is software. After driving this thing for about a 150 miles the problem is back up.
Some of the old codes I saw (provided to me by mechanic):

5dea dsc: transfer case: temperature
6e83 dcs: tyre pressure control: interface
5d95 dcs: control unit, valve relay
6e7d dcs: sporadic undervoltage detectedby EMF control unit. Delete fault memory
5f77 dsc: Engine management: interface

601d dcs interface: signal invalid
601e dcs interface: signal invalid
6023 Control unit: faulty power supply
6041 message error from dsc control unit
d359 no message from EGS control unit, receiver EMF, transmitter EGS/HIM

2d32 differential pressure sensor, intake manifold, plausibillity
2cf8 throttle valve potentiometer
2cf9 throttle valve potentiometer 1
2cfa throttle valve potentiometer 2
2a6b Valvetronic, power limitation
2d13 air mass sensor, rationality

Here are all the warnings (pictures):


This problem was diagnosed to be a failing throttle body. The best part of troubleshooting this was that the throttle body would pass adaptation and not fail during this.
My final understanding of this problem and the troubleshooting of it is that; this problem can be generated by two devices in your x5. Those two devices are bad ecm and failing throttle body.
In my case it was a throttle body. At this time the SAV is at 114k and the issue has not returned.

Another UPDATE:

Some have troubleshot this to be a wiring issue as well.

RougeTrooper 08-03-2013 11:12 PM

How old is your car battery?

ard 08-03-2013 11:22 PM


Originally Posted by RougeTrooper (Post 949848)
How old is your car battery?

Bingo. Same question I was going to ask.

OP- let us know. There are odd issues when the battery begins to fail on these cars...modules get spurious errors as all the handshaking that goes on can be interrupted. You'd think BMW would give you a "bad battery" warning but they dont. You can search here and BF for similar stories. One guy spent thousands with a dealer chasing nonsense, finally a $200 battery did the trick.

X-cellent 08-04-2013 08:58 AM

+3 - first thought was the battery.

gregg3gs 08-04-2013 03:15 PM

I would agree with you if it was not for the battery been replaced over a month ago.

Today I moved the truck over to get my bike out and I see a thin fluid on the driveway.
I wonder if its out of transmission fluid?

ard 08-04-2013 09:23 PM


Originally Posted by gregg3gs (Post 949900)
I would agree with you if it was not for the battery been replaced over a month ago.

Today I moved the truck over to get my bike out and I see a thin fluid on the driveway.
I wonder if its out of transmission fluid?

BMW battery, correct type and all....registered? Did you have the issues after the battery was replaced ?

Doubt it is tranny fluid, and a dry tranny would not cause all those errors IMO

Back to the fluid, what IS it? Could be AC condensate drain.

TerminatorX5 08-05-2013 01:46 AM

a month old battery? what is the source? if you noticed, most folks here point finger to the battery - based on the community experience with those... even your statement that the batteryis new did not phase us off - check the battery UNDER A LOAD... the line in your error log about the undervoltage is very suspicious... if the battery is good, then next stop is alternator... if the alternator is proven beyond reasonable doubt to be innocent, then you need to check the speed sensor modules, the ABS module, the shaft output sensors... even an ambient temperature sensor... since you are getting some of the engine lights, it might make sense to check the spark plugs, coils, fuel filter and fuel pump... if all checks out fine, then move into the tranny... unless you see the sprockets and the tranny gears laying on the ground as you drive away, i would not tamper with tranny when there are so many other things that can go wrong...

you want to go from simple to more complex - this way you will expend least amount of money with the most amount of results... imagine that you overhaul your tranny (which probably will benefit from proper overhaul) and at the end of the day find out that a $20 speed sensor that you could replace yourself was the culprit all along...

jlam86 08-05-2013 03:12 PM

i had the same problem with my 08 4.8i.

turned out to be the throttle body harness.

bmw had to cut and splice a new harness on.

ard 08-05-2013 07:30 PM


Originally Posted by jlam86 (Post 950014)
i had the same problem with my 08 4.8i.



You had those 16 specific error codes?

jlam86 08-05-2013 07:38 PM

Not sure about the codes but had those messages come up on the idrive and similar behavior as you described.

when you start up your car right now, it is very rough similar to a misfire right?

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