Engine-Codes - Isuzu - P0131 Isuzu

P0131 Isuzu Code - HO2S Circuit Low Voltage Sensor 1

- Code Popularity: 7,899 Views
- Repair Importance Level: 2/3
- Repair Difficulty Level: 2/3
Table of contents

|What are the Possible Causes of the Code P0131 Isuzu?

  • Faulty Front Heated Oxygen Sensor Bank 1
  • Front Heated Oxygen Sensor Bank 1 harness is open or shorted
  • Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
  • Inappropriate fuel pressure
  • Faulty fuel injectors
  • Intake air leaks may be faulty
  • Exhaust gas leaks

|How to Fix the P0131 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.

|Code P0131 Isuzu Tech Notes

Replacing the O2 Sensor 1 usually takes care of the problem

|What is the Cost to Diagnose the Code P0131 Isuzu?

Labor: 1.0

The cost to diagnose the P0131 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.

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|When is the P0131 Isuzu Code Detected?

The voltage signal from the sensor is lower than the specified time.

|What are Code P0131 Isuzu Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • High Fuel Consumption
  • Excessive Smoke from Exhaust

|What Does the P0131 Isuzu Code Mean?

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

HO2S Circuit Low Voltage Sensor 1

|Need more Information on the P0131 Isuzu Code?

Need more information on how to fix the P0131 Isuzu code? Get Access to Factory Service Manuals

|Need Help with the P0131 Isuzu Code?

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