N55 2D05 Persistent Code Help

evmo20 · 07-10-2020, 06:49 PM

Hey all,

I just installed a Helix OD and Precision Raceworks Coil kit and have a persistent code that keeps holding me back from refining my tune with Wedge. The code is as follows:

2D05: DME, internal fault, oxygen sensor before catalytic converter: Initialisation error.

With a shadow code of:
2D2F - Oxygen sensors before catalytic converter:Multiple fault

I've replaced both O2 sensors this week and that didnt help. Apparently the PR COil wires emit some sort of electric field that can interfere with the O2 sensor wires, so those are ran behind the head per Wedge's recommendation.

Has anyone else experienced this? Suggestions?

Specktor · 01-31-2021, 04:42 PM

Hey man just wondering if you fixed it because im having the same problem right now

Don_Janusz · 07-05-2023, 12:14 PM

I Have same problem, car is all stock. Already changed O2 sensors and didn’t help. Anyone have contact with similar code and have any solution?

07-10-2020, 06:49 PM	#1
evmo20 Private 13 Rep 84 Posts Drives: 2011 E90 M SPORT Join Date: Mar 2017 Location: Fayetteville, AR iTrader: (2)	N55 2D05 Persistent Code Help Hey all, I just installed a Helix OD and Precision Raceworks Coil kit and have a persistent code that keeps holding me back from refining my tune with Wedge. The code is as follows: 2D05: DME, internal fault, oxygen sensor before catalytic converter: Initialisation error. With a shadow code of: 2D2F - Oxygen sensors before catalytic converter:Multiple fault I've replaced both O2 sensors this week and that didnt help. Apparently the PR COil wires emit some sort of electric field that can interfere with the O2 sensor wires, so those are ran behind the head per Wedge's recommendation. Has anyone else experienced this? Suggestions? __________________ FBO, PS2, MHD, BBK, LSD, M3 Arms, Pioneer, Focal, JL, other goodies
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01-31-2021, 04:42 PM	#2
Specktor Banned 1 Rep 15 Posts Drives: E92 335i FBO PS2 Join Date: Aug 2016 Location: Los Angeles iTrader: (0)	Hey man just wondering if you fixed it because im having the same problem right now
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07-05-2023, 12:14 PM	#3
Don_Janusz Registered 0 Rep 1 Posts Drives: E90 335ix N55 Join Date: Jul 2023 Location: Poland iTrader: (0)	I Have same problem, car is all stock. Already changed O2 sensors and didn’t help. Anyone have contact with similar code and have any solution?
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