DT Codes . com
DTC - Diagnostic Trouble Codes information

P0091

Powertrain Codes

P0091 - ISUZU - Fuel Pressure Regulator Solenoid 1 Control Circit Low Voltage

Symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

- Fuel pressure regulator harness is open or shorted - Fuel pressure regulator electrical circuit poor connection - Faulty fuel pressure regulator

When Detected

Fuel Pressure Regulator (FRP) feedback current less than 400mA