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      12-10-2013, 08:31 PM   #1
UMich_335i
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MD Emissions

I was wondering what others have done with catless DPs and Cobb AP? Do you just have to have your stage 2 tune downloaded to clear the CEL, flash to stage 0 or unmarry? I thought you had to stay in stage 2 to keep the CEL inactive.

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      12-10-2013, 09:58 PM   #2
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Originally Posted by UMich_335i View Post
I was wondering what others have done with catless DPs and Cobb AP? Do you just have to have your stage 2 tune downloaded to clear the CEL, flash to stage 0 or unmarry? I thought you had to stay in stage 2 to keep the CEL inactive.

Thanks!
You have to keep the car flashed to prevent the CEL from appearing, but you also have to use a DP fix to get your downpipes in "ready" mode for emissions.
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      12-11-2013, 09:08 AM   #3
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You have to keep the car flashed to prevent the CEL from appearing, but you also have to use a DP fix to get your downpipes in "ready" mode for emissions.
Would the DP fix be part of the Stage 2+ map settings from Cobb?
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      12-11-2013, 09:09 AM   #4
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Quote:
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Originally Posted by RoyalFlush View Post
You have to keep the car flashed to prevent the CEL from appearing, but you also have to use a DP fix to get your downpipes in "ready" mode for emissions.
Would the DP fix be part of the Stage 2+ map settings from Cobb?
The DP fix is a separate piece from BMS, the link's below.

BMW Downpipe DP Fix by BMS
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      07-22-2014, 06:12 PM   #5
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Decided to wing my emissions test today without DP fix to see if it was really needed... Passed without question. I am catless running a Cobb PTF protune (rest of mods in sig). Looks like MD can pass with 1 readiness check failed (I am assuming it did not pass but do not have the scanner to check for sure). Just thought I would share for those of you worrying about emissions checks.
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      07-22-2014, 07:39 PM   #6
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Nice. I didn't even try without the dp fix the first time around. I guess I will try next time around in 18 months or so.
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