Engine Code 55 - Mustang Evolution

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Old 07-24-2013, 06:45 AM   #1
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Engine Code 55

Is there any way to turn off the beeper or figure out how to fix whatever this means? I have no idea what a key power check would be... Thanks
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Old 07-27-2013, 01:08 PM   #2
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Old 07-28-2013, 11:20 PM   #3
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Five.Oh : 1987-1993 Foxbody Mustang EEC-IV Error Codes

http://www.ifitjams.com/circuit.htm

You're getting low/no voltage to you ECM
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Old 07-29-2013, 12:54 PM   #4
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Thanks for the link so what do I have to do to fix it ?
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Old 07-29-2013, 03:11 PM   #5
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I honestly don't know
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