[DesertBMW]

Having problems with codes 2DD6 2DD8
valvetronic sensor signal implausible, open signal to the servo motor.

When engine is off, the engine constantly will make "rattle" noise every 10 minutes.

What could this be?

[DesertBMW]

When engine is cold, all is fine. Soon as the engine warm up I get those two codes. What could be the problem? Engine only has 32k miles.

valvetronic servo number 11377603979

[weehe126]

Originally Posted by DesertBMW

When engine is cold, all is fine. Soon as the engine warm up I get those two codes. What could be the problem? Engine only has 32k miles.

valvetronic servo number 11377603979

Did you get this figured out? I just got the 2DD8 code at 62k miles.

[Mbrown335i]

Originally Posted by weehe126

Did you get this figured out? I just got the 2DD8 code at 62k miles.

Eccentric shaft, valvetronic motor and eccentric shaft sensor.

The rattle noise I'm guessing you are hearing is the gears on your eccentric shaft binding when the motors trying to actuate it

[Hakentt]

Originally Posted by weehe126

Did you get this figured out? I just got the 2DD8 code at 62k miles.

Yes I had to change servo motor with new unit.

[weehe126]

Thanks guys, just picked a new valvetronic servomotor today. Seems like a pretty straight forward replacement.

[aandriotis]

Originally Posted by weehe126

Thanks guys, just picked a new valvetronic servomotor today. Seems like a pretty straight forward replacement.

i believe my valvetronic motor bad i got the code P1030 on a 2011 135i
was it difficult to replace it ? they told me around $1000 part and labor

[weehe126]

Originally Posted by AriKoRN

i believe my valvetronic motor bad i got the code P1030 on a 2011 135i
was it difficult to replace it ? they told me around $1000 part and labor

I think the part was around $500 and took about 6 hours to do. It's not too difficult, take off the valve cover, remove injectors 1&2 and surrounding section, then slowly spin the eccentric shaft to remove the stops, then remove servomotor. Make sure you have new decouplers for the injectors and caps for the tips while they are off.

[Hakentt]

Originally Posted by AriKoRN

i believe my valvetronic motor bad i got the code P1030 on a 2011 135i
was it difficult to replace it ? they told me around $1000 part and labor

It took me only 2 hours to replace the servo motor but I am mechanic. It may be difficult for someone who never works on cars

[5tony]

Originally Posted by weehe126

I think the part was around $500 and took about 6 hours to do. It's not too difficult, take off the valve cover, remove injectors 1&2 and surrounding section, then slowly spin the eccentric shaft to remove the stops, then remove servomotor. Make sure you have new decouplers for the injectors and caps for the tips while they are off.

I thought you only needed to remove the two coils next to the valvetronic motor. Are you sure the fuel injectors have to be removed? Is there a good DIY guide for this?

[weehe126]

Originally Posted by 5tony

I thought you only needed to remove the two coils next to the valvetronic motor. Are you sure the fuel injectors have to be removed? Is there a good DIY guide for this?

You have to remove all of the coils as you have to take the VG off. There are two "chambers" (im not sure what to call them) that have the 1+2 and 3+4 injectors in them. BMW says to remove all 4, but I did it just fine with removing 1+2 and their chamber. Once you take off the VG you will understand what I mean. I dont think there is a diy.

[VeniVidiVici]

Did you drive it after you heard the noise? Did you get it fixed?

[weehe126]

Originally Posted by VeniVidiVici

Did you drive it after you heard the noise? Did you get it fixed?

If you are asking me, I drove with the sound for 3 months before a code popped up. Idle was a little rough and lost 1-2 mpg so was hard to identify until the code.

[lurker14]

Originally Posted by weehe126

If you are asking me, I drove with the sound for 3 months before a code popped up. Idle was a little rough and lost 1-2 mpg so was hard to identify until the code.

I drove it for a few months after the code would not go away, same thing slightly wonky idle on warm up but power and driving were fine. I don't pay enough attention to notice if mpg changed.

[cemong]

Originally Posted by DesertBMW

When engine is cold, all is fine. Soon as the engine warm up I get those two codes. What could be the problem? Engine only has 32k miles.

valvetronic servo number 11377603979

640i F13, with only 3k mileage. have exactly the same problem. rattle noise every few minutes and RANDOM drivetrain and drive stabilisation warning...
turn on and off engine to erase the warnings..SA said report said bad valvetronic. part number is 11-377-60-3976
yours is 9 at the end. mine is 6..

[cemong]

just an update. had the valvetronic servo motor replaced by the dealer. paid 295 bucks including labor.
part is paid by BMW asia as part of a goodwill progrM. lucky me. car runs perfect now. no more rattling noises too!