P0191 Diagnostic Trouble Code Discussion for September 2022
Fuel Rail Pressure Sensor Performance
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| Help Request | Posted | |
| 2006 Ford Explorer Eddie Bauer 4.6L MIL Lamp on VIN: 1FMEU74886 P0191: Fuel pressure sensor A circuit/Perf. The pcm sets a p0191 code and the fuel pump is running all the time with the key on, unable to command fuel pump duty cycle or shut fuel pump off with scan tool. FRP Sensor was originally replaced due to it testing faulty. FPDM was tried as the fuel pump c... |
September 09, 2022 |
