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      01-24-2013, 06:43 AM   #2
JimD
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Drives: 128i convertible
Join Date: Apr 2009
Location: Lexington, SC

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I think he may have meant the catalytic converter. It is a filter of the exhaust - in a way. There are oxygen sensors before and after the catalytic that are often the source of a check engine light.

If you have an android or apple phone you might want to look into an app called "torque". You need a bluetooth connection for the OBDII (about $25) and this $5 app and you can, among other things, read and clear check engine lights. A more typical use is to create virtual gauges. It will also graph data. Nice little app.

Jim
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128i Convertible, MT, Alpine White, Black Top, Taupe Leatherette, Walnut, Sport
Ordered 5/22/09, Completed 6/4/09, At Port 6/9/09, On the Georgia Highway 6/13/09, Ship Arrived Charleston 6/24/09 at 10pm, PCD 7/21/09