Engine-Codes - Infiniti - P1051 Infiniti

P1051 Infiniti Code - Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2

- Code Popularity: 21,537 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
Table of contents

|What are the Possible Causes of the Code P1051 Infiniti?

  • Faulty Air Fuel Ratio Sensor 1 Bank 2
  • Air Fuel Ratio Sensor 1 Bank 2 harness is open or shorted
  • Air Fuel Ratio Sensor 1 Bank 2 circuit poor electrical connection

|How to Fix the P1051 Infiniti 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 P1051 Infiniti 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 P1051

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

|What is the Cost to Diagnose the Code P1051 Infiniti?

Labor: 1.0

The cost to diagnose the P1051 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.

Does your Infiniti have Safety Recalls? → Check here

|When is the P1051 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 Code P1051 Infiniti Possible Symptoms?

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

|What Does the P1051 Infiniti Code Mean?

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.

P1051 Infiniti Code - Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2

|Need more Information on the P1051 Infiniti Code?

Need more information on how to fix the P1051 Infiniti code? Get Access to Factory Service Manuals

|Information for Specific Infiniti Models

|Need Help with the P1051 Infiniti Code?

Get the P1051 Infiniti code diagnosed by a professional: Find a repair shop in your area