E89 2.3i stalling on idle 2D2A code

[Naylz]

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 I posted this on an old thread in E89 problems too

….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

 

[flybobbie]

I just used contact cleaner on the maf sensor.
If you are in UK, Halfords sell electrical contact cleaner, £6.

 

[Naylz]

Ok, so far… removed throttle body gave it a good clean with carb cleaner, it was a bit dirty but wouldn’t say excessive. Removed MAP sensor and sprayed with carb cleaner although there’s not much to see on these, it’s kind of a small tube. Also removed DISA, found small part of green seal around the flap had split but again not convinced this would cause much problem. Removed MAF and cleaned with carb cleaner, and checked air filter too. Had a good look for splits/ leaks on ducting and nothing found, also checked oil filler cap secure and no splits in oil filter cap.

I’m now sat engine running in idle with my AUTOPHIX 7910 plugged in, I reset all the codes on ECM however “2D28 Differential pressure sensor, intake manifold signal “remains and will not clear. I am now looking at the data stream for motor operating values and the “intake-manifold pressure (hpa) is reading a permanent figure of 799.91, it does not change at all even when revving engine. I have just unplugged the MAP sensor and that figure starts showing a value of around 48 to 50 fluctuating, if I Rev engine it drops to around 20. When I plug the MAP sensor back in it just reads 799.91 permanently again????

Anyway the time it’s taken me to write all this my engine hasn’t stalled once…maybe the stalling was a dirty throttle body? And this remaining code is another issue…which I hope to also fix

Any thoughts good people?

 

[tintoverano]

check that the throttle valve opens - if yes, replace the sensor

 

[Naylz]

Yes throttle valve moves, I have ordered a new MAP sensor, let’s hope it’s the right fix