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2010 2011 BMW 5 Series Forum F10 F10 Technical Topics Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications CEL with Catless DP and JB4
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      02-14-2020, 03:06 PM   #1
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CEL with Catless DP and JB4

I feel like this has to have been covered somewhere but I have searched for about an hour and come up without a definitive answer. I have an F10 535i with JB4. Would like to run a catless downpipe, but need to know what will be required to prevent a CEL. Just a defouler? Or is there a way to make the JB4 handle that task? Thanks!
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      02-14-2020, 03:25 PM   #2
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Works for me just with defouler post cat.
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      02-14-2020, 03:42 PM   #3
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Quote:
Originally Posted by ziekxq View Post
Works for me just with defouler post cat.
Perfect, thanks!
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      02-15-2020, 08:49 AM   #4
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Quote:
Originally Posted by ziekxq View Post
Works for me just with defouler post cat.
ready to put my VRSF catless dp here this month. bro, do you remember which defouler you bought and where? appreciate it
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