P0191 - Fuel Rail Pressure Sensor A Circuit Range/Performance
WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. 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 comprehensive component monitor (CCM) checks the fuel rail pressure (FRP) sensor for an acceptable fuel pressure. The test fails when the fuel pressure falls below or exceeds a minimum/maximum calibrated value for a calibrated period of time. | |||
| Possible Causes: |
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| Diagnostic Aids: | The FRP PID value during key ON, engine running should be between 275 kPa (40 psi) and 485 kPa (70 psi). | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory | |
| All | refer to PINPOINT TEST DD . | |||