P0191 - Fuel Rail Pressure Sensor A Circuit Range/Performance
WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
P0191 - FUEL RAIL PRESSURE SENSOR A CIRCUIT RANGE/PERFORMANCE
| Description: The powertrain control module (PCM) continuously monitors the fuel rail pressure (FRP) sensor input to determine if the FRP signal is within an expected range. The test fails when the fuel pressure falls below or exceeds a minimum or maximum calibrated value for a calibrated period of time. | |||
Possible Causes:
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| Diagnostic Aids:
The presence of this DTC may indicate that the vehicle is operating in derate mode and may experience a loss of power. Monitor the FRP PID with the ignition ON, engine running. The correct FRP is between 34.47 MPa (5000 psi) and 48.26 MPa (7000 psi). |
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| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST M . | ||