BMW 435i error codes still...

Tuned435i · 10-03-2015, 12:16 PM

I have a JB4, ER charge pipe, ER catted downpipe, and a injen CAI. The car seems to run fine, but i get a "drivetrain malfunction" code almost every time i drive it. After doing a few logs on the jb4, it told me that i am only getting -5psi of boost. These are the codes: 120308 Boost pressure lower than expected, 108F01 Boost pressure lower than expected. How can i fix this problem?

Buckeyes · 10-03-2015, 12:17 PM

Send the code and email Burger

Buckeyes · 10-03-2015, 12:18 PM

Firmware up to date?

Paolo73 · 10-04-2015, 01:47 AM

Check the westgate..anyway do U have same problem without jb4?

mbanks21 · 09-27-2016, 01:36 PM

Was this ever resolved? Im having the same exact issue/codes

J_MENIS · 09-27-2016, 04:15 PM

I had the same issue, but it turns out because my firmware on my Jb4 was way out of date

mbanks21 · 09-27-2016, 04:33 PM

Mine is wastegate or diverter valve related

10-03-2015, 12:16 PM	#1
Tuned435i Private 75 Rep 78 Posts Drives: 2017 M2 6spd Join Date: Jun 2015 Location: Tampa, FL iTrader: (0)	BMW 435i error codes still... I have a JB4, ER charge pipe, ER catted downpipe, and a injen CAI. The car seems to run fine, but i get a "drivetrain malfunction" code almost every time i drive it. After doing a few logs on the jb4, it told me that i am only getting -5psi of boost. These are the codes: 120308 Boost pressure lower than expected, 108F01 Boost pressure lower than expected. How can i fix this problem?
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10-03-2015, 12:17 PM	#2
Buckeyes Captain 353 Rep 939 Posts Drives: 2013 335i M Sport Join Date: Jan 2013 Location: Atlanta iTrader: (2)	Send the code and email Burger
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10-03-2015, 12:18 PM	#3
Buckeyes Captain 353 Rep 939 Posts Drives: 2013 335i M Sport Join Date: Jan 2013 Location: Atlanta iTrader: (2)	Firmware up to date?
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10-04-2015, 01:47 AM	#4
Paolo73 Second Lieutenant 184 Rep 224 Posts Drives: Bmw M4 YMB Join Date: Jul 2014 Location: Pordenone/ITALY iTrader: (0)	Check the westgate..anyway do U have same problem without jb4?
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09-27-2016, 01:36 PM	#5
mbanks21 Colonel 1268 Rep 2,953 Posts Drives: 2015 335i MSport Join Date: Aug 2013 Location: High Bridge, NJ iTrader: (8)	Was this ever resolved? Im having the same exact issue/codes
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09-27-2016, 04:15 PM	#6
J_MENIS Lieutenant 115 Rep 462 Posts Drives: 435i Join Date: Jul 2016 Location: San Francisco iTrader: (0)	I had the same issue, but it turns out because my firmware on my Jb4 was way out of date
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09-27-2016, 04:33 PM	#7
mbanks21 Colonel 1268 Rep 2,953 Posts Drives: 2015 335i MSport Join Date: Aug 2013 Location: High Bridge, NJ iTrader: (8)	Mine is wastegate or diverter valve related __________________ 2015 335i Msport/6 JB4/EWG/E30/VRSF DP/ER CP/ VRSF Race Exhaust/ Injen Intake/Verde Axis 19x8.5/9.5 245/35/275/30 Conti Extreme CS/ H&R Sports / Motorsport Hardware Stud Conversion
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