Engine-Codes - Isuzu - P0091 ISUZU

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

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|P0091 ISUZU code 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)

|How is the P0091 ISUZU code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|What is the cost to diagnose the P0091 ISUZU code

Labor: 1.0

The cost to diagnose the P0091 ISUZU code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P0091 ISUZU code detected?

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

|What are P0091 ISUZU code possible symptoms?

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

|What is P0091 ISUZU code meaning?

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.

|Need more information with the P0091 ISUZU code?

Need more information on how to fix the P0091 ISUZU code?
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|Need help with a P0091 ISUZU code?

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