Engine-Codes
 
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P0091 ISUZU

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

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

Possible causes

  • Faulty fuel pressure sensor
  • Fuel pressure sensor harness is open or shorted
  • Fuel pressure sensor electrical circuit poor connection
  • Faulty Engine Control Module (ECM)
    What does this mean?

    • When is the code detected?

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

    Possible symptoms

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

    • P0091 Isuzu Description

    The Engine Control Module (ECM) uses commanded fuel pump flow to determine a desired fuel rail pressure. The actual fuel pressure is monitored using the Fuel Rail Pressure (FRP) Sensor.
    OBDII Code P0091 Isuzu - Fuel Pressure Regulator Solenoid 1 Control Circuit Low Voltage - Engine-Codes.com

    Related Information

    Repair Importance Level: 3
     
    1=Low 2=Medium 3=High  
    Repair Difficulty Level: 3
     
    1=Easy 2=Moderate 3=Hard  
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