E89 Idle Engine Issue (Shutdown or Drops Hard)

[ph001]

As you have the N52, the first thing to check for would be oil contamination on the eccentric shaft sensor (if you search for that on here you will see plenty of helpful posts). Unplugging the MAF causes the ECU to run on a default map so it may disregard some other sensors also - which can certainly cause confusion!!

I would suspect either a problem with the eccentric shaft sensor or the valvetronic motor.

[JockinJD]

Hello,

Just wanted to confirm what the fix was should anyone stumble on this when suffereing from a similar issue.

Issue was: Test for air mass and manifold pressure sensor found pressure to have no signal to DME, so it required a new pressure sensor which now reports and the idle issues have gone.

Thanks for points that lead to the fix chaps.

It can be placed for sale and I feel good it's all working

[ph001]

Thanks for updating and thats the first time I have ever heard of the MAP sensor failing so rare indeed. At least it very easy to get to and change

[Naylz]

Resurrecting this post…so my 2.3i 2010 E89 decided to cutout when sat stationary in traffic, it starts again no bother. There are two codes 2D2A differential pressure sensor, intake manifold adaption and 2D06 air mass system. Upon reset the 2D06 clears and 2D2A remains, when left idling for a few minutes it just cuts out and 2D06 comes back.

I am planning to check the cleanliness of the throttle body and obviously check for any leaks, splits on my way to the body. I am also going to pull the MAP sensor, does anyone know if this is a cleanable sensor or not?

I know unplugging the MAF sensor means it won’t cut out but also doesn’t necessarily mean it’s the MAF sensor, I have tried and confirmed this.

I have an AUTOPHIX 7910, does anyone know if that can that test the MAP sensor?…ie what would I need to look for on the data stream??

I will also check the DISA and most likely give Vanos solenoids a clean too but don’t think they are the issue here.

Any tips or pointers will be very much appreciated

….ooo just remembered an issue I had on my 2.5i E85 where the wiring looms were loose where they plugged into that big black box thing at the back Righthand side of the engine bay…I will check that too

[mcbutler]

Oh whoops good point, updated original post regarding.

Its the 2009 BMW e89 Sdrive 23i

Its in your original post bud