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P1378 Diagnostic Trouble Code Discussion for August 2012

FICM Supply Voltage Low Voltage

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Trouble Ticket Help Requests for DTC P1378
Help Request Posted
2004 Ford E-450 Super Duty 6.0L No Start VIN: 1FDXE45P24
P1378: FICM Supply Voltage Circuit Low. I hope we are not overlooking something else testing this code. FICM logic power is .5 volts, FICM main power is 47.9, FICM vehicle power was 11.48. Previous posts said the FICM logic should be no less than 10.5 volts. Is this correct? We've seen posts about h...
August 16, 2012