Engine-Codes - Isuzu - P0091 Isuzu

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

- Code Popularity: 41,444 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code P0091 Isuzu?

  • 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 to Fix the P0091 Isuzu Code?

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 Code P0091 Isuzu?

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.

Does your Isuzu have Safety Recalls? → Check here

|When is the P0091 Isuzu Code Detected?

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

|What are Code P0091 Isuzu Possible Symptoms?

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

|What Does the P0091 Isuzu Code Mean?

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.

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

|Need more Information on the P0091 Isuzu Code?

Need more information on how to fix the P0091 Isuzu code? Get Access to Factory Service Manuals

|Need Help with the P0091 Isuzu Code?

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