P054B Code

Dalbmw · 03-20-2016, 11:59 AM

Posted this in the E90 forum, but also posting here for more exposure as I'd like to get this fixed before Monday.

I just replace my OFHG using the DIY on this site. I also replace the serpentine belt, belt tensioner, & idler pulleys. Now when I fire the car up I get code P054B along with a CEL & rough idle.

Any thoughts on what could be wrong? I've double checked all electrical connections. Any help is appreciated!

2011 E90 335i N55

BayMoWe335 · 03-20-2016, 01:16 PM

Vanos solenoids.

vsix · 03-20-2016, 02:02 PM

EGR?

Dalbmw · 03-20-2016, 02:08 PM

I cleaned and swapped the vanos solenoids (intake & exhaust), now I get P052B & P054B You think the solenoids need to be replaced? It's just weird that they would go out after working on the car.

Thanks!

03-20-2016, 11:59 AM	#1
Dalbmw Enlisted Member 17 Rep 30 Posts Drives: BMW 335i Join Date: Jan 2013 Location: Dallas iTrader: (0)	P054B Code Posted this in the E90 forum, but also posting here for more exposure as I'd like to get this fixed before Monday. I just replace my OFHG using the DIY on this site. I also replace the serpentine belt, belt tensioner, & idler pulleys. Now when I fire the car up I get code P054B along with a CEL & rough idle. Any thoughts on what could be wrong? I've double checked all electrical connections. Any help is appreciated! 2011 E90 335i N55
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03-20-2016, 01:16 PM	#2
BayMoWe335 Colonel 1201 Rep 2,132 Posts Drives: 2010 E92 335i 6MT Join Date: Aug 2009 Location: US iTrader: (0)	Vanos solenoids.
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03-20-2016, 02:02 PM	#3
vsix Lieutenant Colonel 603 Rep 1,598 Posts Drives: M3 E92 sold, M4 F82 Join Date: Nov 2012 Location: ATL iTrader: (0)	EGR?
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03-20-2016, 02:08 PM	#4
Dalbmw Enlisted Member 17 Rep 30 Posts Drives: BMW 335i Join Date: Jan 2013 Location: Dallas iTrader: (0)	I cleaned and swapped the vanos solenoids (intake & exhaust), now I get P052B & P054B You think the solenoids need to be replaced? It's just weird that they would go out after working on the car. Thanks!
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