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      12-02-2011, 05:41 PM   #1
turugara
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Drives: 335i Coupe, 6 Speed
Join Date: May 2011
Location: NYC

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2011 BMW 335i  [9.44]
Problem: n55 no power, building 0 boost. No codes! Help!

Hey

My n55 2011 335i is currently making no boost. The jb4 module is showing that there is less than 1-2lbs of boost being made. No error codes are thrown.

I looked around the charge pipe area, specifically around the areas that would usually crack, and didn't find any fault. I event went so far to pour water over the parts to see if any air bubbles came out.

Does anyone have a hunch on what the issue may be?

The only part of the intake/exhaust system that I hvae modified is a Helix FMIC. I checked all connections and they all seemed to be on tight.

EDIT: Codes thrown
Shows up as 2 12 5 7 with half engine light
Then a few minutes later, another code
2 12 9 0

Translates to 2C57
Charge-Air Pressure Control,, Lower Value: Boost Pressure too low. The diagnostic function monitors the pressure measured by the boost-pressure sensor


and 2C90
Blow off valve, mechanics, jammed closed.

Last edited by turugara; 12-02-2011 at 07:06 PM..
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