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

- Code Popularity: 45,988 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P0091 Isuzu?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other 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)
⚠ Does your Isuzu have Safety Recalls? → Check here

How to Fix the DTC P0091 Isuzu?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for P0091 Isuzu Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0091 Isuzu code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

When is the Code Detected?

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

What are Code Possible Symptoms?

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

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

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Code P0091 Isuzu comments

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