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      07-22-2018, 10:17 PM   #1
SPEEDRACER/n54
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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
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      07-23-2018, 05:55 AM   #2
Rob09msport
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Do you have any mods ?
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      07-23-2018, 07:36 AM   #3
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Do you have any mods ?
Yea I do
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      07-24-2018, 11:42 AM   #4
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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, 05:56 AM   #5
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You need to list your mods and mileage and then we can give much better response
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      07-25-2018, 09:28 AM   #6
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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
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      07-25-2018, 09:29 AM   #7
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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
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      07-26-2018, 11:09 AM   #8
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Try running lambda adoption then clear codes and perform the readiness drive cycle. See what happens then...
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      07-27-2018, 07:22 AM   #9
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Try running lambda adoption then clear codes and perform the readiness drive cycle. See what happens then...
Okay I'll try that thanks
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      07-28-2018, 03:45 PM   #10
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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
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      08-01-2018, 12:40 PM   #11
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check fuses
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      08-02-2018, 04:58 AM   #12
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check fuses
Checked all fuses they are all good
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      08-02-2018, 04:59 AM   #13
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Quote:
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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
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      08-03-2018, 09:30 AM   #14
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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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      08-04-2018, 01:52 PM   #15
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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 ??
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      08-07-2018, 06:07 PM   #16
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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 06:15 PM..
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      08-11-2018, 06:50 PM   #17
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Quote:
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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
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      08-13-2018, 11:36 AM   #18
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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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      08-15-2018, 07:41 AM   #19
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Quote:
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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
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      09-06-2018, 09:09 AM   #20
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following ..


By any chance did you check the adapters (connectors) to the O2 sensors?
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      09-23-2018, 03:38 PM   #21
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Did you ever figure this out? Having the same problem for the past couple years as well. It's driving me crazy.
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      09-24-2018, 10:52 AM   #22
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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
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