Engine Malfunction after MHD install

alddiem415 · 12-29-2017, 01:18 PM

I have a N55 2011 335i xdrive AT. Installed catless vrsf DP last Wednesday. I already have vrsf charge pipe. So today, i installed/flashed stage 2 mhd with no problems.
I cleared any dme codes..
After starting the car, engine malfunction came on my screen.
I scanned it and got these dme codes

2C58- charging pressure control switch off

2C71- Boost charging pressure sensor, plausibility, after run; pressure too high

2C83- charging pressure plausibility; pressure too high

What should i do?
Should i flash it back to stock then reflash back to stage 2?

I appreciate any help

Welcome to NBA Jam · 12-29-2017, 01:28 PM

Flash it back to stock, drive around, see if codes still exist. If not, flash back to Stage 2, see if codes occur again. If codes occur again, log the engine, send it to Twisted Tuning for help.

aaron_ · 12-29-2017, 05:44 PM

Seems like boost solenoid to me

alddiem415 · 12-29-2017, 07:43 PM

I activated the N20 sensor earlier so I deactivated it. No more engine malfunction. Drove it around and never showed up.

I felt the difference but i noticed that the transmission (sport mode) was shifting slow. May be i need to flash my transmission too.

12-29-2017, 01:18 PM	#1
alddiem415 Private First Class 36 Rep 157 Posts Drives: 2011 335i xdrive Join Date: Dec 2016 Location: 08096 iTrader: (0)	Engine Malfunction after MHD install I have a N55 2011 335i xdrive AT. Installed catless vrsf DP last Wednesday. I already have vrsf charge pipe. So today, i installed/flashed stage 2 mhd with no problems. I cleared any dme codes.. After starting the car, engine malfunction came on my screen. I scanned it and got these dme codes 2C58- charging pressure control switch off 2C71- Boost charging pressure sensor, plausibility, after run; pressure too high 2C83- charging pressure plausibility; pressure too high What should i do? Should i flash it back to stock then reflash back to stage 2? I appreciate any help
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12-29-2017, 01:28 PM	#2
Welcome to NBA Jam Is it the shoes!? 3884 Rep 5,112 Posts Drives: (Sold) 2011 E92 335i ZMP 6MT Join Date: Mar 2014 Location: USA iTrader: (1)	Flash it back to stock, drive around, see if codes still exist. If not, flash back to Stage 2, see if codes occur again. If codes occur again, log the engine, send it to Twisted Tuning for help.
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12-29-2017, 05:44 PM	#3
aaron_ Captain 90 Rep 671 Posts Drives: E93 335i LCI Join Date: Dec 2015 Location: Sydney iTrader: (0)	Seems like boost solenoid to me
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12-29-2017, 07:43 PM	#4
alddiem415 Private First Class 36 Rep 157 Posts Drives: 2011 335i xdrive Join Date: Dec 2016 Location: 08096 iTrader: (0)	I activated the N20 sensor earlier so I deactivated it. No more engine malfunction. Drove it around and never showed up. I felt the difference but i noticed that the transmission (sport mode) was shifting slow. May be i need to flash my transmission too.
	Appreciate 0 Quote