[austinse90]

Hello E90Post!
I am having a problem with a BMW, a 2011 BMW 335i (N55). I bought this car a little over a month ago, the terrible Engine Malfunction notification. My car is bone stock, there are no modifications to it.
When inspecting the instrument panel of the car itself, there is no SES light. The car doesn't have the notification when I shut it off then that on. However, the light will return upon acceleration. The weird part is, the acceleration does not have to be a hard one. It will either pop up in 'D' as I am flooring it of course, but sometimes when I am just driving like a sane person it still comes up. One way around this is driving in 'DS', it helps for the first couple of pushes but push it too hard and the code will sure still show up.

Things I have tried to do:
I have inspected the vacuum lines going across and behind the oil housing gasket and the one behind the engine as well. I have inspected my charge pipe and my left air intake.

Codes that show:
When I used a code reader, both carly and high-end cod reader show code 2C57, which could be anything because its a boost leak.
The description reads "Charge pressure control, plausibility: Pressure too low ".

I've been having this problem for over a couple weeks now and all I want to do is get it fixed. The car still works fine but it bothers me to see that I am already experiencing a problem. I don't know what else to do except for all the steps I have already taken.

All the help is super appreciated by me. If anyone has had this problem please reach out, if not then any support is good.

[MyCar]

Double check the charge pipe. Are you sure there are no cracks at the seam where the plastic is plastic welded together?

[austinse90]

It looks pretty solid I would have to say, upon inspection it's all one piece.

[austinse90]

BUMP

[relative4]

Vacuum test boost control hoses, test boost control solenoid, boost leak test.

[gbalthrop]

Originally Posted by austinse90

...2011 BMW 335i (N55)...the terrible Engine Malfunction notification. My car is bone stock, there are no modifications to it. When inspecting the instrument panel of the car itself, there is no SES light. The car doesn't have the notification when I shut it off then that on. However, the light will return upon acceleration. The weird part is, the acceleration does not have to be a hard one...Codes that show:...B]2C57[/B]

I don't know anything about the N55 Engine, but BMW Fault Code lookup provides the following "View" information which has a "Service Plan" for Code 2C57:
http://www.bmwfault.codes/XMLDiagVie...YAMAA1ADAANAA=

That Service Plan suggests first item to be checked is "Charging Pressure Sensor" and its wiring to the DME which is shown as B6583 on the following TIS Schematic:
https://www.newtis.info/tisv2/a/en/e...upply/CkLmMkPM

Here is the "Installation Location" for B6583, Charging Pressure Sensor:
https://www.newtis.info/tisv2/a/en/e...i-lim/BwquLUuT

George