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P0191 Diagnostic Trouble Code Discussion for June 2010

Fuel Rail Pressure Sensor Performance


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Trouble Ticket Help Requests for DTC P0191
Help Request Posted
2005 Ford Freestyle SE 3.0L Excessive Emissions, No Start, Poor Idle Quality, Stall, MIL Lamp on VIN: 1FMZK01135
P0191: Fuel Rail Pressure Sensor circuit performance. ... a Freestyle trying to run on 90psi fuel pressure. Current code P0191, scan tool data shows 0 psi so we replaced FPTS with same results. After further testing realized the 5volt reference at sensor was 2.4 volts. Backprobed PCM and same. Infact PCM pin#'s B...
June 02, 2010
2004 Ford E-350 Super Duty 5.4L Misfire, MIL Lamp on VIN: 1FDWE35L14
P0191: Fuel rail pressure out of range. Ok guys, i'm not the best driveability guy out there, and this ones got me stumped. This is a minibus that sits at idle a lot. It came to me running fine but when i let it sit at idle after 10 or 15 minutes it starts to missfire and the fuel trim goes up to 22...
June 14, 2010
2000 Mercury Sable LS 3.0L Cuts out VIN: 1MEFM59S6Y
P0191: Fuel rail pressure range. ... out problem. Customer said while he stopped at a lite that the car cut out he left it on the side for about two hours and later on he drove it in to us without a driving problem. After i scanned the car i found code p0191 (fuel rail pressure range). Fuel p...
June 23, 2010
2005 Ford Freestyle SE 3.0L Excessive Emissions, No Start, Poor Idle Quality, Stall, MIL Lamp on VIN: 1FMZK01135
P0191: Fuel Rail Pressure Sensor circuit performance. ... a Freestyle trying to run on 90psi fuel pressure. Current code P0191, scan tool data shows 0 psi so we replaced FPTS with same results. After further testing realized the 5volt reference at sensor was 2.4 volts. Backprobed PCM and same. Infact PCM pin#'s B...
June 02, 2010
2004 Ford E-350 Super Duty 5.4L Misfire, MIL Lamp on VIN: 1FDWE35L14
P0191: Fuel rail pressure out of range. Ok guys, i'm not the best driveability guy out there, and this ones got me stumped. This is a minibus that sits at idle a lot. It came to me running fine but when i let it sit at idle after 10 or 15 minutes it starts to missfire and the fuel trim goes up to 22...
June 14, 2010
2000 Mercury Sable LS 3.0L Cuts out VIN: 1MEFM59S6Y
P0191: Fuel rail pressure range. ... out problem. Customer said while he stopped at a lite that the car cut out he left it on the side for about two hours and later on he drove it in to us without a driving problem. After i scanned the car i found code p0191 (fuel rail pressure range). Fuel p...
June 23, 2010