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BMW e60 525d 41AA error code
18-08-2019, 17:33 PM,
Post: #1
XZBMW  BMW e60 525d 41AA error code
Hello.
I have this dreaded code 41AA and can’t get it fixed. I already changed new turbo, new MAP sensor, all vacuum lines are new, the air system has no leaks.
The car has stage 1 and Dpf off.
When the error code appears, the car seems like on stock power 177hp; if i restart the car, the car drives fine like 218hp. 
Does anyone know a fix for this code?
Thanks!
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19-08-2019, 11:14 AM,
Post: #2
RE: BMW e60 525d 41AA error code
Car goes in limp mode? Check boost pressure smile

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19-08-2019, 14:06 PM, (This post was last modified: 19-08-2019, 14:07 PM by djallexinno.)
Post: #3
RE: BMW e60 525d 41AA error code
Yes, it goes into some kind of limp mode... let’s say from stage 1 to stock power. I spoke with a tuner today and he says it is related to bad dpf off...

I run air mass test with Ista, all values are proper.
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19-08-2019, 18:20 PM,
Post: #4
RE: BMW e60 525d 41AA error code
i think it can be 2 options 1) variable nozzle have an fallout 2) if do you have the dpf only pierced and not replace to an metal pipe, the backpressure may be too high.

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