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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 > JB4 Causing Issues with Emission Inspection?



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      05-16-2012, 02:44 PM   #1
frankgpass
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JB4 Causing Issues with Emission Inspection?

I just had the dealership call me and tell me that they had to reset an exhaust module then let it sit over night because the module was no enabled for emissions testing? I cleared codes, checked codes, turned of CAN FLAP and disabled JB4. Has any one heard of this or had this happen? Could it be coincidence? I'm thinking not
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      05-16-2012, 02:59 PM   #2
Mike@N54Tuning.com
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Was the JB4 on map0?

If it was on map0 then its on complete bypass mode. Did you have the auto clear function on or cat less downpipes installed? If you did you require about 30-50 miles on the car for the emissions system to reach readiness.

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      05-16-2012, 03:07 PM   #3
frankgpass
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Yes on map 0...what does that mean? Can they fix it with a reset? Did I have to do something else? No autoclear codes...and stock exhaust...will it work from a reset if it's on complete bypass mode?

Last edited by frankgpass; 05-16-2012 at 03:24 PM.
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