P0091 ISUZU Fuel Pressure Regulator Solenoid 1 Control Circit Low Voltage

Possible causes
– Faulty fuel pressure regulator
– Fuel pressure regulator harness is open or shorted
– Fuel pressure regulator electrical circuit poor connection
When is the obd code mean?
Fuel Pressure Regulator (FRP) feedback current less than 400mA
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)