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      11-28-2012, 08:59 PM   #6
stilov
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Drives: 07 335i
Join Date: Mar 2009
Location: Allen, TX

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The built in feature on the JB4 will NOT pass emissions...it constantly gets a "not ready" status.
The external DPfix actually simulates a working o2 sensor and will allow a "ready" status needed in order to pass.