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P0191 Diagnostic Trouble Code Discussion for April 2015

Fuel Rail Pressure Sensor Performance

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Trouble Ticket Help Requests for DTC P0191
Help Request Posted
2006 Ford E-450 Super Duty 6.8L Hesitation, Surge, Misfire VIN: 1FDXE45SX6
P0191: Fuel rail pressure. Ok here goes i have a bus that sets a code po191 sometimes had my scanner hooked up its says disired fuel pressure is 64.5 but sometime its right there and then it will be 9 psi then it goes back up i changed out the fuel pump relay and the fuel pump assy my q...
April 30, 2015