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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > P112E and P0171 codes n55 335i e92 2012



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      09-27-2023, 06:24 AM   #1
lomon98
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P112E and P0171 codes n55 335i e92 2012

Hi,

A month ago the code P112F popped up in my OBD reader after seeing the full engine warning light come up. I did the adaptation procedure then the throttle reset and the code disappeared.

Two days ago I updated the DME software as I read it was a fix to the rough idling at low rpms and throttle lag. I think it actually fix it as these last two days the idling is not even that rough (could be a coincidence maybe?). Today I got the codes P112E and P0171 with the respective engine light of course.

I doubt this is due to the DME update as I was getting P112F before so was just wondering if you guys have any idea of what it could be. The car is completely stock and has done 104k miles so I am praying it is just a cracked charge pipe? Anyway I don't know how serious it can get, hopefully not too much...

Cheers!
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      09-28-2023, 07:59 AM   #2
lomon98
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P112E and P0171 codes n55 335i e92 2012

Update:

okay so the engine warning light disappeared, but OBD reader is still reading the code P112E with the message "manufacturer control".

Any idea of that the problem could be?

Thanks!
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      10-02-2023, 05:18 PM   #3
SlowE92
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Quote:
Originally Posted by lomon98 View Post
Update:

okay so the engine warning light disappeared, but OBD reader is still reading the code P112E with the message "manufacturer control".

Any idea of that the problem could be?

Thanks!
I'd check your map sensor and check the connection.
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