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Old 01-23-2007, 02:15 PM   #75
Furious George
Scooby Newbie
Member#: 109742
Join Date: Mar 2006
Chapter/Region: MAIC
Location: PHL
2002 WRX


I had the same problem for a while, it would come on every 80 miles or so, especially if I was cruising around in vacuum a lot.

Turns out that one of my catch can lines was not FULLY tightened. By visual inspection it looked like it was sealed tight, but it was only in a fit of despair and rage while I was untightening and retightening everything did I notice it was not 100% tight.

Moral of the story is, even though a Pre-turbo hose may LOOK like it is nicely sealed, it may be pulling in just enough air to make the CEL go off under vacuum.

Hope this helps.
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