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P0191 Diagnostic Trouble Code Discussion for April 2013

Fuel Rail Pressure Sensor Performance

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Trouble Ticket Help Requests for DTC P0191
Help Request Posted
2002 Ford Taurus SE 3.0L Hesitation VIN: 1FAFP53U02
P0191: Fuel rail pressure sensor preformance. Customer came in with a locked up engine. Replaced engine with a junk yard unit. Vehicle went for test drive and feels like clogged convertors. Tested fuel pressure and at the time at full throttle had 5 psi of pressure. Replaced fuel pump with a junkyard unit...
April 15, 2013
2006 Ford F-150 XLT 5.4L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 1FTPW14546
P0191: fuel rail pressure sensor range performance. Vehicle came in on the tow truck because it lost power on the highway. Truck runs and drives fine under light acceleration. Under medium to heavy acceleration the truck just does not accelerate. Feels and sounds like a maf or converter problem. STFT 1 AND 2 AR...
April 20, 2013