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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 > 2011 335i error



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      10-03-2015, 11:33 PM   #1
Legal335xdrive
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2011 335i error

Today while I was just cruising my car threw a check engine light and 2 error codes (2C56 & 2C58). Does anyone know what would cause these to come up? Wasn't during WOT. Thanks in advance. My car is fbo and protuned on E50 (if that mattters).
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      10-04-2015, 08:29 AM   #2
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Originally Posted by Legal335xdrive View Post
Today while I was just cruising my car threw a check engine light and 2 error codes (2C56 & 2C58). Does anyone know what would cause these to come up? Wasn't during WOT. Thanks in advance. My car is fbo and protuned on E50 (if that mattters).
Here is the BMW code list it might help you figure it out.
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File Type: pdf N55 Tech Code List.pdf (788.0 KB, 274 views)
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      10-04-2015, 08:32 AM   #3
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Originally Posted by Legal335xdrive View Post
Today while I was just cruising my car threw a check engine light and 2 error codes (2C56 & 2C58). Does anyone know what would cause these to come up? Wasn't during WOT. Thanks in advance. My car is fbo and protuned on E50 (if that mattters).
Looks like Boost pressure too high & Boost pressure build-up blocked are what the codes are.
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      10-04-2015, 10:12 AM   #4
Legal335xdrive
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Quote:
Originally Posted by Dconnelly9191 View Post
Looks like Boost pressure too high & Boost pressure build-up blocked are what the codes are.
That's strange, I was just cruising when it happened. I'll check my connections and couplings. Thanks for the reply.
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      08-29-2016, 08:11 AM   #5
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Bump for an old thread

This happened to me at wot. Car is a 2011 n55 recently flashed ppk. Only happened this arvo. Codes read and cleared. Will see if it happens again

What are the usual culprits and cost of fix. The spreadsheet mentions wastegates and solanoids
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      09-14-2016, 12:38 AM   #6
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Make that x3. Have been having this BS for a while now. Replaced spark plugs, coils, had the walnut blasting done. This week the CP crapped out so put ER CP in and the same 2C56 and 2C58 light up. I can replicate this 100% of the time by going WOT in 3rd gear all the way through 5th. I can almost never get to 5th gear shifting at about 6,500RPM w/o going into the limp mode. I can definitely feel the car hesitating when going WOT, almost as if it is misfiring, but less severe. Can hear what sounds like turbo sound going "PSH PSH PSH" until I throw limp mode. I will be replacing both oxygen sensors this week to see if O2 sensors could have something to do with this. Car is 100% stock except the ER CP. Running 91 OCT pump gas.
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      09-16-2016, 06:49 AM   #7
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update? WOT 3rd and 4th gear triggers these faults. anyone know the cause?
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