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      12-02-2012, 03:49 PM   #4
Tee-Dub
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Drives: 2008 135i
Join Date: May 2009
Location: Vancouver, WA

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From what I've been reading most tuning devices can be set to "auto clear" codes, but this doesn't mean the system will show a "ready" state for OBDII emissions testing. What you need is an O2 simulator/emulator like the one BMS sells. This fools the DME into seeing a varying signal from the O2 sensors as if they were working normally, as I understand it.