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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 > Someone please help - problem after bench flash



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      10-18-2018, 12:18 AM   #1
Xdrive35i2014
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Someone please help - problem after bench flash

After my local mechanic has extracted my ECU for bench flashing, i have been getting the following code from Carly:

PT-CAN message (status combination, 0x1B4) MIL-control implausible.

CODE: 003BCF

It seems like my car is no longer boosting as i am getting a 2C57 error. My diverter valve is not going off as well. Car is in limp mode or "engine malfunction error". Can someone please help? I am at the end of the ropes here... This is a nightmare come true for me as I have always been afraid something would go wrong after a bench flash!!!

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      10-18-2018, 01:07 AM   #2
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I'm sorry to hear that man. Has your mechanic done a N55 bench flash before?
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      10-18-2018, 01:09 AM   #3
Xdrive35i2014
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Quote:
Originally Posted by Turbod View Post
I'm sorry to hear that man. Has your mechanic done a N55 bench flash before?
from my understanding, yes.

This is off the n55 diagnostic list:

MEVD17.2-
BN2000 0x3BC7 15303 PT-CAN, message (CAS control unit):missing
The diagnostic function monitors reception of
the message.

Seems like the CAS control unit wasn't plugged in properly?
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      10-18-2018, 03:16 AM   #4
Xdrive35i2014
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hey guys, it seems like my car is not boosting at all. WHen i took my car in, i asked the tech to remove JB4 as well. Is it at all possible the engine malfunciton(triggered by 2C57) is simply caused by the boost solenoid not reconnected correctly?

I know for sure my car's charge pipe, intercooler, etc have no leaks as my car would hold boost ok prior to removing JB4.

The way my car drives now is that i feel there is no boost building at all. My car would throw a cell at around 3k rpm but the error message would be gone after i restart my car. If i go very light on throttle (off boost), there is no error messsages at all. In fact, i drove that way for half an hour and all was fine. As soon as i add more gas (enters boost range), my car would throw an engine malfunction error message.

Are there any DIY guides for installing PRESSURE CONVERTER 11747626351 ? i would like to verify the connections myself...

update: PT-CAN message (status combination, 0x1B4) MIL-control implausible.

CODE: 003BCF

THis error does not trigger engine power reduction per the n55 diagnostic fault code list.

2C57 is causing my car to throw a cell. I am suspecting either the PRESSURE CONVERTER is not reconnected properly or it has failed. What do you guys think?
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Last edited by Xdrive35i2014; 10-18-2018 at 04:55 AM..
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      10-19-2018, 04:33 PM   #5
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My local BMW specialist, CG Motorsport has figured out the problem via a smoke test. It is a vacuum line to the pressure converter was disconnected. Car is now running without any issues.

The other shop that took off my jb4 and bench flashed my ecu probably knocked it off by accident?
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