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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Codes after DP Fix removed, inspection passed



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      12-06-2012, 04:35 AM   #1
badfish718
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Codes after DP Fix removed, inspection passed

Ok, so installed the BMS DP Fix went through the drive cycle and passed inspection no problem. So I removed the Fix and now I keep getting P2C7F and P2C6A randomly after driving for 30+ minutes or anytime I reset learning.

I can't find much on the topic so maybe somebody can help me out. Is this just me putting the yellow wires back into the wrong position on the ECU? I went through it pretty carefully and don't think I messed up, but being a Cobb guy I am not too comfortable digging into the ECU to begin with...
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      12-06-2012, 11:54 PM   #2
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Bump, could use any advice!
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      12-07-2012, 07:38 AM   #3
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How about using their guide ?

Here: http://burgertuning.com/instructions/BMSdownpipefix.pdf
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      12-07-2012, 08:40 AM   #4
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what does the code description say? what map are you running?
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      12-07-2012, 10:57 AM   #5
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Thanks, I obviously went through the guide but there is nothing about throwing codes after removing the standalone fix.

Code descriptions have to do with Lambda probe

"Lambda probe after catalytic converter 2, trimming control"

I was running Stage 2+ v402, but after passing the only station that sells E85 I couldn't help myself and switched over the the E30 map and I haven't thrown a CEL since, but it's only been around 50 miles.

I'm kind of just wondering if anyone else has come across issues after removing the DP Fix unit because I was running fine beforehand and I installed it correctly since I did pass inspection.

Appreciate the help!
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      12-07-2012, 11:13 AM   #6
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Quote:
Originally Posted by badfish718 View Post
Thanks, I obviously went through the guide but there is nothing about throwing codes after removing the standalone fix.

Code descriptions have to do with Lambda probe

"Lambda probe after catalytic converter 2, trimming control"

I was running Stage 2+ v402, but after passing the only station that sells E85 I couldn't help myself and switched over the the E30 map and I haven't thrown a CEL since, but it's only been around 50 miles.

I'm kind of just wondering if anyone else has come across issues after removing the DP Fix unit because I was running fine beforehand and I installed it correctly since I did pass inspection.

Appreciate the help!
I'm a bit confused , why did you remove the DPfix after inspection...keep it on?
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      12-07-2012, 11:34 AM   #7
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I'm a bit confused , why did you remove the DPfix after inspection...keep it on?
The DPFix will throw off the ECU's long-term Lambda adaptations. Remove it when you don't need to pass inspection.
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      12-07-2012, 11:37 AM   #8
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Quote:
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The DPFix will throw off the ECU's long-term Lambda adaptations. Remove it when you don't need to pass inspection.
Yea everything I've read said to remove it once inspection is finished.
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      12-07-2012, 01:06 PM   #9
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Yea everything I've read said to remove it once inspection is finished.
Have you switched back to Stage 2+ since the codes went away? Just wondering if I'll get this headache when I need to pass the OBD scan -- Thinking I'll just completely uninstall the COBB
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      12-07-2012, 01:15 PM   #10
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Have you switched back to Stage 2+ since the codes went away? Just wondering if I'll get this headache when I need to pass the OBD scan -- Thinking I'll just completely uninstall the COBB
No, but I can try later when I drive out to BK.

Is it ok to run an E30 blend without running the E30 map? I assume it is but you would know better than I.
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      12-07-2012, 01:21 PM   #11
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Is it ok to run an E30 blend without running the E30 map? I assume it is but you would know better than I.
If you're running the E30 Map with the correct amount of Ethanol, then run that map just because the fueling table is more appropriate since the regular pump gas maps won't pump enough gas for your ethanol-blend.

Just try to run the tank really low, pump in more 93 & then switch back to Stage 2+
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      12-07-2012, 01:38 PM   #12
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Quote:
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If you're running the E30 Map with the correct amount of Ethanol, then run that map just because the fueling table is more appropriate since the regular pump gas maps won't pump enough gas for your ethanol-blend.

Just try to run the tank really low, pump in more 93 & then switch back to Stage 2+
OK, yea that actually makes sense.

I'm at 3/4 tank now, I'm sure my gas light will come on within an hour of driving lol


Also I still have the DP Fix if anyone needs, going to list it in a few days but priority to anyone who is taking the time to read this thread trying to help me out lol...pm if interested
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      12-07-2012, 02:21 PM   #13
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Also I still have the DP Fix if anyone needs, going to list it in a few days but priority to anyone who is taking the time to read this thread trying to help me out lol...pm if interested
I can't PM (coming off a ban), but I'm gonna need one eventually -- How much were you looking for? I might be able to pick it up since I'm nearby, 973
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      12-07-2012, 02:27 PM   #14
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$75 shipped, if you come pick it up $70
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      12-07-2012, 11:30 PM   #15
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No, but I can try later
This is the problem here! Cobb provides O2 code suppression ONLY for their S2+ maps. If you want to use a lower map and still have O2 code suppression, you'll need to use ATR and quickly generate your own map.
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      12-15-2012, 12:56 AM   #16
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i just uninstalled bms dp fix and am getting the same 2 codes as you. on cobb stg2+ map. has me wondering if maybe we switched the 2 yellow wires when putting them back in.
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      12-15-2012, 01:00 AM   #17
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i just uninstalled bms dp fix and am getting the same 2 codes as you. on cobb stg2+ map. has me wondering if maybe we switched the 2 yellow wires when putting them back in.
First thing i would try is to reset the ECU and then the clear DTCs and see if they come back. If so, then the yellow wires are the next logical step.
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      12-15-2012, 01:34 AM   #18
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yea i need to drive around to see if they come back. i just wish i new for sure what the yellow wires did. if i figure it out ill report back.
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      12-15-2012, 01:53 AM   #19
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Quote:
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This is the problem here! Cobb provides O2 code suppression ONLY for their S2+ maps. If you want to use a lower map and still have O2 code suppression, you'll need to use ATR and quickly generate your own map.
Bingo! Btw, I've left in my DPfix for over a year running cobb s2+ no issues with afr whatsoever.
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      12-15-2012, 11:29 AM   #20
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Bingo! Btw, I've left in my DPfix for over a year running cobb s2+ no issues with afr whatsoever.
Trust me, it's there....
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      12-16-2012, 09:30 AM   #21
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I bought a new car with the DP fix already installed. I am not running any tunes just cattless and the DP fix. Do I need to remove the DP fix? And only install when I need to pass inspoection? or is this only for people running tunes? I am not throwing any codes right now...
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      12-16-2012, 09:39 AM   #22
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Can you fit the DP fix without removing the DPs? It is tight down there
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