Engine-Codes - Infiniti - P1031 INFINITI

P1031 INFINITI Code - Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 1

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3
Table of contents

|P1031 INFINITI code possible causes

  • Faulty Air Fuel Ratio Sensor 1 Bank 1
  • Air Fuel Ratio Sensor 1 harness is open or shorted
  • Air Fuel Ratio Sensor 1 circuit poor electrical connection

|How is the P1031 INFINITI 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.

|P1031 INFINITI code tech notes

There is a Factory Service Bulletin for the following Infiniti models:
2004-2005 Infiniti FX35 2WD
2004-2005 Infiniti FX35 4WD
2004-2005 Infiniti G35 Sedan 2WD
2004-2005 Infiniti G35 Sedan 4WD
Infiniti Factory Service Bulletin OBDII Code P1031

The bulletin suggests reprogramming the Engine Control Module (ECM) first before replacing any parts.

|What is the cost to diagnose the P1031 INFINITI code

Labor: 1.0

The cost to diagnose the P1031 INFINITI 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 P1031 INFINITI code detected?

The current amperage in the heated air fuel ratio (A/F) sensor 1 heater circuit is out of the normal range. An excessively low voltage signal is sent to Engine Control Module (ECM) through the heated air fuel ratio (A/F) sensor 1 heater.

|What are P1031 INFINITI code possible symptoms?

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

|What is P1031 INFINITI code meaning?

The Engine Control Module (ECM) performs ON/OFF duty control of the Air Fuel Ratio (A/F) sensor 1 heater corresponding to the engine operating condition to keep the temperature of A/F sensor 1 element at the specified range.

|Need more information with the P1031 INFINITI code?

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|P1031 INFINITI code information for specific Infiniti models

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