i drove my 307 home from calaias with a loss of power but what can the answer be

Question

i have the code P0190 fuel rail pressure sensor A circuit ,,, from the AA man, who tried to clear the fault but it would not clear, also about a month ago i had a fault on the car that was just like a spark plug that was missing and that fault led to a small part of the wiring loomb that had to be renewed coul all this combine to be my problem etc, many thanks

Answer 1

P0190 Fuel rail pressure sensor circuit "A"

The fuel pressure rail supplies voltage to the fuel pump as the vehicle demands for fuel. It can be from the wire loom or the rail pressure itself, The rail pressure is a common failure, When P0190 codes up there is no need to measure fuel pressure you need to satisfy the code P0190 before you can take a fuel pressure test, You can measure the voltage for the fuel rail pressure and if (B+) is present replace the fuel rail sensor.