Engine-Codes.com
Engine-Codes – Infiniti – P1051 Infiniti

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

Quick Answer

The P1051 code for Infiniti vehicles indicates an issue with the Air Fuel Ratio Sensor 1 Heater Control Circuit on Bank 2. Common causes include Faulty Air Fuel Ratio Sensor 1, Wiring issues in the heater control circuit, Faulty engine control module. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1051 Infiniti indicates Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2.
Common causes
Common causes include Faulty Air Fuel Ratio Sensor 1, Wiring issues in the heater control circuit, Faulty engine control module.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P1051 Infiniti Description

The P1051 code for Infiniti vehicles indicates an issue with the Air Fuel Ratio Sensor 1 Heater Control Circuit on Bank 2. This sensor is responsible for monitoring the air-fuel mixture in the exhaust system and sending data to the engine control module to ensure optimal combustion. The heater control circuit is crucial as it helps the sensor reach operating temperature quickly for accurate readings.

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

Common Causes of P1051 Infiniti

  1. Faulty Air Fuel Ratio Sensor 1
  2. Wiring issues in the heater control circuit
  3. Faulty engine control module
  4. Poor electrical connection
  5. Corrosion or damage to sensor components

Symptoms of P1051 Infiniti

  1. Decreased fuel efficiency
  2. Rough idling or misfiring
  3. Poor acceleration
  4. Stalling
  5. Check Engine Light illuminated

How to Fix P1051 Infiniti

  1. Diagnose the issue using a scan tool to confirm the P1051 code.
  2. Inspect the wiring and connections related to the Air Fuel Ratio Sensor.
  3. Test the sensor's heater element for proper function.
  4. Replace the Air Fuel Ratio Sensor 1 if it is determined to be faulty.
  5. Clear the code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1051 Infiniti

The cost of repairing the Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2 can vary depending on the make and model of the vehicle, as well as the specific components that need to be replaced. On average, you can expect to pay between $200 and $500 for parts and labor. Keep in mind that labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.

What does this mean?

Tech Notes for P1051 Infiniti

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.

When is the 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.

Need more information about the P1051 Infiniti code?

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

Need Help with the Code?

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

Information for Specific Infiniti Models

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1051 Infiniti Code

1. What are the common symptoms of OBDII code P1051 in an Infiniti?

- Common symptoms include poor fuel economy, rough idling, engine misfires, and potential stalling.

2. What causes the OBDII code P1051 in an Infiniti?

- The code is usually triggered by a malfunction in the Air Fuel Ratio Sensor 1 Heater Control Circuit on Bank 2, which can be caused by wiring issues, a faulty sensor, or a blown fuse.

3. How can I diagnose the OBDII code P1051 in my Infiniti?

- Diagnosis typically involves checking the wiring and connectors of the Air Fuel Ratio Sensor 1 on Bank 2, testing the sensor itself, and verifying the integrity of related fuses.

4. Can I still drive my Infiniti with the OBDII code P1051 present?

- It is not recommended to drive the vehicle with this code present, as it can lead to poor engine performance and potential damage if left unresolved.

5. What is the repair process for fixing OBDII code P1051 in an Infiniti?

- The repair process usually involves replacing the Air Fuel Ratio Sensor 1 on Bank 2, repairing any wiring issues, and ensuring proper connection and functionality of the sensor.

6. Are there any DIY tips for addressing OBDII code P1051 in an Infiniti?

- DIY tips include checking for visible wiring issues, ensuring proper sensor connection, and verifying the condition of related fuses before considering sensor replacement.

7. How much does it typically cost to repair OBDII code P1051 in an Infiniti?

- The cost of repair can vary depending on the extent of the issue, but it typically ranges from $200 to $500, including parts and labor.

8. Can resetting the OBDII code P1051 in my Infiniti fix the issue temporarily?

- Resetting the code may temporarily turn off the check engine light, but it will not address the underlying problem causing the code to trigger.

9. How long does it take to repair OBDII code P1051 in an Infiniti?

- The repair process can usually be completed within a few hours, depending on the availability of parts and the complexity of the issue.

10. Is it necessary to take my Infiniti to a dealership for OBDII code P1051 repair?

- While you can take your vehicle to a dealership for repair, this issue can also be addressed by independent mechanics or auto repair shops specializing in Infiniti vehicles.

Discuss the causes and fixes for P1051 Infiniti OBDII Code

Submit a New Comment