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      08-10-2009, 08:52 AM   #16
jeremyc74
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Drives: '08 135i Montego/Terra
Join Date: Feb 2008
Location: Evansville, IN

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Quote:
Originally Posted by JimD View Post
This is also one of those situations where having a OBDII reader is nice. You can get one for around $50 (mine came from Harbor Freight and I think I paid $40 on sale) and if something like this happens, plug it in and see if there are codes. If there are, your dealer should have no issue checking it out. You can also reset the codes if it's something silly like the gas cap.

Jim
I doubt the codes for the top will show up in a standard code reader. They're not going to be the standard OBDII codes, and may not even be stored in the ECU. There's another module that controls a lot of the interior functions (they call it the "footwell" module) and I think that's where the top functions are controlled from. The dealership techs can likely pull fault history from it though.

The stuff you get from the standard OBDII readers is just the government mandated standard emissions codes.
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