P0191 FORD -focus 2006 zx4

Question

What happen to my car when fuel rail pressure sensor failed

Answer 1

P0191 Fuel rail pressure sensor "A" circuit performance range

The fuel rail pressure sensor replace the fuel pressure regulator, The way the fuel rail pressure works is to give fuel on demand by apply voltage to increase fuel pressure as the engine demands. It may not cause any obvious drivabilty problem but it surely will cause you to stall out unexpectedly.Make the fuel pressure sensor a hobby in replacing.