Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Yellow ! light comes on
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Old 03-08-2009, 10:43 AM   #15
domesplit
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What I Drive: 2002 ZX5 and 2003 SVT ZX5

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I had the same problem. Like stated above it was a loose connection on my battery. Also every time the yellow light came on I also heard a thump in my auto transmission that scared the hell out of me. I could also see how it could be a coil pack though. But ever since I tightened all the battery connections the problem went away.
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