Hey guys

SPEEDRACER/n54 · 07-22-2018, 11:17 PM

I have 2009 bmw 335i xdrive I keep getting code 2c7e and 2c2b for my 02 sensors,I replaced all 4 02 sensors with factory oxygen sensors n still persist if really like some inputs thanks

Rob09msport · 07-23-2018, 06:55 AM

Do you have any mods ?

SPEEDRACER/n54 · 07-23-2018, 08:36 AM

Quote:

Originally Posted by Rob09msport

Do you have any mods ?

Yea I do

Moce72 · 07-24-2018, 12:42 PM

Could be in the wrong banks, I had the same problem when I got my cat back from a hack mechanic, I swapped them and problem solved

Rob09msport · 07-25-2018, 06:56 AM

You need to list your mods and mileage and then we can give much better response

SPEEDRACER/n54 · 07-25-2018, 10:28 AM

Quote:

Originally Posted by Rob09msport

You need to list your mods and mileage and then we can give much better response

Car has 61k miles on it really driven,have installed,mishimoto intercooler,and oil catch can,vrsf charge pipe with tial bov,afe dual cone intake,I've replaced coils yesterday and plugs,changed my injectors about 4 months ago I replaced all 4 of my 02 sensor weekend past,retro fitted hard motorsport oil cooler and I'm running all that on mhd stage 1 plus tune

SPEEDRACER/n54 · 07-25-2018, 10:29 AM

Quote:

Originally Posted by Moce72

Could be in the wrong banks, I had the same problem when I got my cat back from a hack mechanic, I swapped them and problem solved

I'm 150 percent sure they are not in the Wong banks thts the part thts getting to me

Cabdriver · 07-26-2018, 12:09 PM

Try running lambda adoption then clear codes and perform the readiness drive cycle. See what happens then...

SPEEDRACER/n54 · 07-27-2018, 08:22 AM

Quote:

Originally Posted by Cabdriver

Try running lambda adoption then clear codes and perform the readiness drive cycle. See what happens then...

Okay I'll try that thanks

SPEEDRACER/n54 · 07-28-2018, 04:45 PM

Quote:

Originally Posted by SPEEDRACER/n54

Quote:

Originally Posted by Cabdriver

Try running lambda adoption then clear codes and perform the readiness drive cycle. See what happens then...

Okay I'll try that thanks

Issue still persists

Synectic · 08-01-2018, 01:40 PM

check fuses

SPEEDRACER/n54 · 08-02-2018, 05:58 AM

Quote:

Originally Posted by Synectic

check fuses

Checked all fuses they are all good

SPEEDRACER/n54 · 08-02-2018, 05:59 AM

Quote:

Originally Posted by SPEEDRACER/n54

Quote:

Originally Posted by Synectic

check fuses

Checked all fuses they are all good

This thing is getting to me been dealing with this issue for over 2 years now

Rob09msport · 08-03-2018, 10:30 AM

Bad cat ? You have dps ? Try o2 sims or spark plug foulers also could run stage 2 which codes out probes for cat delete

SPEEDRACER/n54 · 08-04-2018, 02:52 PM

Quote:

Originally Posted by Rob09msport

Bad cat ? You have dps ? Try o2 sims or spark plug foulers also could run stage 2 which codes out probes for cat delete

Can I run stage 2 without Changing the stock downpipe wouldn't tht mess up the car ??

Cabdriver · 08-07-2018, 07:07 PM

Could be your cats....
Personally, I think you should get the issue resolved before jumping to st2 - it is recommended to run catless with 2 or 2+.
If you have bad cats, you could end up causing bigger problems with st2.

Did the car have jb4 previously? Did the car have catless dp previously?

SPEEDRACER/n54 · 08-11-2018, 07:50 PM

Quote:

Originally Posted by Cabdriver

Could be your cats....
Personally, I think you should get the issue resolved before jumping to st2 - it is recommended to run catless with 2 or 2+.
If you have bad cats, you could end up causing bigger problems with st2.

Did the car have jb4 previously? Did the car have catless dp previously?

I'm not sure,and I wasn't going to run stage 2 Withou doing so figured there a reason why it says it's Recomend

Rob09msport · 08-13-2018, 12:36 PM

If you have fmic you can run stage 2 it is not v recommended to do back to back pulls but wedge himself has stated just log and you will be fine.i am not suggesting to daily stage 2 I mean flash and drive normally , you don't even have do pulls but see if the codes go away if they do you know your cats are bad

SPEEDRACER/n54 · 08-15-2018, 08:41 AM

Quote:

Originally Posted by Rob09msport

If you have fmic you can run stage 2 it is not v recommended to do back to back pulls but wedge himself has stated just log and you will be fine.i am not suggesting to daily stage 2 I mean flash and drive normally , you don't even have do pulls but see if the codes go away if they do you know your cats are bad

Okay understand I appreciate the input I'll try it out

DS3IAM · 09-06-2018, 10:09 AM

following ..

By any chance did you check the adapters (connectors) to the O2 sensors?

AWCR1MC · 09-23-2018, 04:38 PM

Did you ever figure this out? Having the same problem for the past couple years as well. It's driving me crazy.

SPEEDRACER/n54 · 09-24-2018, 11:52 AM

Quote:

Originally Posted by DV135i

Did you ever figure this out? Having the same problem for the past couple years as well. It's driving me crazy.

Nah never dis still having the issue bro

07-22-2018, 11:17 PM	#1
SPEEDRACER/n54 New Member 16 Rep 28 Posts Drives: 2009 BMW 335 xdrive Join Date: Jan 2017 Location: Queens New York iTrader: (0)	Hey guys I have 2009 bmw 335i xdrive I keep getting code 2c7e and 2c2b for my 02 sensors,I replaced all 4 02 sensors with factory oxygen sensors n still persist if really like some inputs thanks __________________ Sp
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07-23-2018, 06:55 AM	#2
Rob09msport Lieutenant 128 Rep 488 Posts Drives: 09 335 msport Join Date: Nov 2016 Location: Mount Sinai ny iTrader: (1)	Do you have any mods ?
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07-24-2018, 12:42 PM	#4
Moce72 Enlisted Member 14 Rep 41 Posts Drives: 2011 335i xdrive Join Date: Sep 2014 Location: Long Island, NY iTrader: (0)	Could be in the wrong banks, I had the same problem when I got my cat back from a hack mechanic, I swapped them and problem solved
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07-25-2018, 06:56 AM	#5
Rob09msport Lieutenant 128 Rep 488 Posts Drives: 09 335 msport Join Date: Nov 2016 Location: Mount Sinai ny iTrader: (1)	You need to list your mods and mileage and then we can give much better response
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07-26-2018, 12:09 PM	#8
Cabdriver Private First Class 52 Rep 164 Posts Drives: 2009 E90 335i Join Date: Jun 2016 Location: NJ iTrader: (0)	Try running lambda adoption then clear codes and perform the readiness drive cycle. See what happens then...
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08-01-2018, 01:40 PM	#11
Synectic Private 21 Rep 80 Posts Drives: 2010 e92 335i mtech Join Date: Sep 2011 Location: New York iTrader: (0)	check fuses
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08-03-2018, 10:30 AM	#14
Rob09msport Lieutenant 128 Rep 488 Posts Drives: 09 335 msport Join Date: Nov 2016 Location: Mount Sinai ny iTrader: (1)	Bad cat ? You have dps ? Try o2 sims or spark plug foulers also could run stage 2 which codes out probes for cat delete
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08-07-2018, 07:07 PM	#16
Cabdriver Private First Class 52 Rep 164 Posts Drives: 2009 E90 335i Join Date: Jun 2016 Location: NJ iTrader: (0)	Could be your cats.... Personally, I think you should get the issue resolved before jumping to st2 - it is recommended to run catless with 2 or 2+. If you have bad cats, you could end up causing bigger problems with st2. Did the car have jb4 previously? Did the car have catless dp previously? Last edited by Cabdriver; 08-07-2018 at 07:15 PM..
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08-13-2018, 12:36 PM	#18
Rob09msport Lieutenant 128 Rep 488 Posts Drives: 09 335 msport Join Date: Nov 2016 Location: Mount Sinai ny iTrader: (1)	If you have fmic you can run stage 2 it is not v recommended to do back to back pulls but wedge himself has stated just log and you will be fine.i am not suggesting to daily stage 2 I mean flash and drive normally , you don't even have do pulls but see if the codes go away if they do you know your cats are bad
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09-06-2018, 10:09 AM	#20
DS3IAM Lieutenant 201 Rep 552 Posts Drives: E90 335 XI Join Date: Jun 2016 Location: NJ iTrader: (7)	following .. By any chance did you check the adapters (connectors) to the O2 sensors? __________________ 2009 335i xDrive 6MT // Black Sapphire / Cold Weather / M Sport / PDC / Premium Package / Aerodynamic Kit / Anthracite headliner / Keyless Entry / AR Design Catless Downpipe / Style 313 19" Wheels/ OEM Euro Taillights / LUX H8 160
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09-23-2018, 04:38 PM	#21
AWCR1MC Private First Class 11 Rep 89 Posts Drives: 135i Join Date: Feb 2013 Location: San Francisco iTrader: (0)	Did you ever figure this out? Having the same problem for the past couple years as well. It's driving me crazy. __________________ ~19T turbos upgrade by turbo labs~3.5 Bar Tmap~PR Ignition Kit~VRSF Inlets and outlets~VTT Cast Valve Cover~VTT Dual CC~XClutch Twin Disk~BMS Short Shifter~ER Competition FMIC Kit w/ HKS SSQV~3"AR DP's~3" Custom exhaust~Fuel-It Stage 2 Bucket~ Turner solid engine and transmission mounts~
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