<E39> Check Engine light is on

• Subject: <E39> Check Engine light is on
• From: Fred Hu <[email protected]>
• Date: Tue, 13 Aug 1996 16:43:54 -0500

>Is it possible for this to be caused by a not completely tight gas cap?

IMHO, yes, it's highly possible.  All 96 and up US cars have OBDII computer.
One of the purpose of OBDII is to make sure there is no gas fume leak.  A
poorly sealed gas cap will trigger the check engine light.

Fred Hu
91 525iA

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