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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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      03-10-2013, 10:28 PM   #45
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Quote:
Originally Posted by james008
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...
Get a tune ASAP!
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      03-11-2013, 09:32 PM   #46
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That is weird, I have both JB4 and Procede and I believe they both have DP fix built-in, unless they automatically clear all the cat codes, it shouldn't have thrown codes right after I switched. I have reset ECU couple times, also check if my pre-o2 sensors were correctly installed (which I think they are, black wire goes to long dp, grey goes to the shorter one). codes keep coming back. only other thought is that my o2 sensors have gone bad and considering my car is almost 7yrs old, this could be the reason. I emailed Cobb and waiting for their response before replacing my o2 sensors.

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Originally Posted by badfish718 View Post
Thanks to a forum member, I switched the yellow wires #19 and #20 opposite to what it says in the DP Fix instructions and I have not thrown a related code since.
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      03-13-2013, 12:46 AM   #47
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Quote:
Originally Posted by HermanL View Post
That is weird, I have both JB4 and Procede and I believe they both have DP fix built-in, unless they automatically clear all the cat codes, it shouldn't have thrown codes right after I switched. I have reset ECU couple times, also check if my pre-o2 sensors were correctly installed (which I think they are, black wire goes to long dp, grey goes to the shorter one). codes keep coming back. only other thought is that my o2 sensors have gone bad and considering my car is almost 7yrs old, this could be the reason. I emailed Cobb and waiting for their response before replacing my o2 sensors.
What codes are you getting?
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      03-17-2013, 09:31 PM   #48
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Quote:
Originally Posted by badfish718 View Post
What codes are you getting?
P2C7F and P2C6A

exactly the same codes as you have before, I have never messed dp fix but I am going to check it out right now, maybe the previous owner have two pins switched.
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      03-22-2013, 02:40 AM   #49
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You ever figure it out?

I would PM but I think this thread has some pretty valuable info considering how many people run catless DPs on the N54...
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