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P0231 Diagnostic Trouble Code Discussion for November 2009

Fuel Pump Feedback Circuit Low Voltage

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Trouble Ticket Help Requests for DTC P0231
Help Request Posted
2004 Ford F-250 Super Duty King Ranch 6.0L No Start VIN: 1FTNW21P94
P0231: Fuel Pump Secondary Circuit Low. Vehicle came in with a no start. Verified 50 psi of fuel from transfer pump. Noticed no injector buzz at key on. Tried to perform a buzz test with scanner with no reaction. Looked at FICM PIDs for 48V and found all zeros. Checked FICM relay, and power and grou...
November 20, 2009