ford 2009 250 superduty fuel rail pressure sensorlocation

Question

hase code 191fuel rail pressure sensor range/perfopmance 171 bank 1 combustipon too lean 174 same

Answer 1

P0191 Fuel rail pressure sensor A circuit range / performance

If you are setting a lean code condition, more than likely the fuel pressure is reporting the condition of the fuel pressure from its actual pressure.

​ What happens when you set a P0191 something is affecting the performance of the fuel pump, majority of the time the fuel pump strainer falls apart and allows debris to enter the fuel pump causing it to internally jams intermittently, the fix requires the replacement of the fuel pump and a new strainer