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P1051 2005 Infiniti G35 Code - Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2

Quick Answer

The P1051 code on a 2005 Infiniti G35 indicates an issue with the Air Fuel Ratio Sensor 1 Heater Control Circuit Low on Bank 2. Common causes include Faulty air fuel ratio sensor, Damaged heater circuit, Wiring or connection issues. 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 2005 Infiniti G35 indicates Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2.
Common causes
Common causes include Faulty air fuel ratio sensor, Damaged heater circuit, Wiring or connection issues.
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 11, 2024
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Code P1051 2005 Infiniti G35 Description

The P1051 code on a 2005 Infiniti G35 indicates an issue with the Air Fuel Ratio Sensor 1 Heater Control Circuit Low on Bank 2. This sensor is responsible for monitoring the air-fuel mixture in the exhaust system and providing feedback to the engine control module for optimal performance. The heater control circuit is designed to heat up the sensor quickly to reach operating temperature faster, which allows for more accurate readings and better engine performance.

OBDII Code P1051 2005 Infiniti G35 - Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2
P1051 2005 Infiniti G35 Code - Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2

Common Causes of P1051 2005 Infiniti G35

  1. Faulty air fuel ratio sensor
  2. Damaged heater circuit
  3. Wiring or connection issues
  4. Engine control module malfunction

Symptoms of P1051 2005 Infiniti G35

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Hesitation during acceleration
  4. Misfires
  5. Failed emissions test

How to Fix P1051 2005 Infiniti G35

  1. Begin by conducting a thorough diagnostic scan to confirm the P1051 code and identify the specific cause.
  2. Inspect the air fuel ratio sensor and its heater circuit for any visible damage or defects.
  3. Test the sensor's resistance and voltage to determine if it is functioning within the manufacturer's specifications.
  4. Check the wiring and connections for any signs of corrosion, damage, or loose connections.
  5. Replace the air fuel ratio sensor if it is found to be faulty, repair any damaged wiring or connections, and clear the code to reset the system.

Cost to Fix P1051 2005 Infiniti G35

The typical repair costs for addressing a P1051 code on a 2005 Infiniti G35 can range from $200 to $500, including parts and labor. However, it is essential to note that the specific diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships and lower at independent shops. To obtain a more precise estimate, it is advisable to inquire about local rates before proceeding with the repair.

What does this mean?

Tech Notes for P1051 2005 Infiniti G35

There is a Factory Service Bulletin for the 2005 Infiniti G35:

2005 Infiniti G35 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 2005 Infiniti G35 code?

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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 2005 Infiniti G35 Code

1. What are the common symptoms of OBDII code P1051 on a 2005 Infiniti G35?

- Common symptoms include poor fuel economy, rough idling, and a noticeable decrease in engine performance.

2. What could cause the OBDII code P1051 on a 2005 Infiniti G35?

- The code P1051 typically indicates a malfunction in the Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2, which could be caused by a faulty sensor, wiring issues, or a blown fuse.

3. How can I diagnose the issue causing OBDII code P1051 on my 2005 Infiniti G35?

- To diagnose the problem, you can use an OBDII scanner to retrieve the code and then inspect the wiring, sensor connections, and fuse related to the Air Fuel Ratio Sensor 1 Heater Control Circuit on Bank 2.

4. Is it safe to continue driving my 2005 Infiniti G35 with OBDII code P1051?

- It is not recommended to continue driving with the code P1051, as it can lead to poor engine performance and potential damage if left unresolved.

5. How can I repair OBDII code P1051 on my 2005 Infiniti G35?

- Repairing the code P1051 may involve replacing the Air Fuel Ratio Sensor 1 on Bank 2, repairing any damaged wiring, or addressing any blown fuses related to the heater control circuit.

6. Can I fix OBDII code P1051 on my 2005 Infiniti G35 myself?

- While some DIY enthusiasts may be able to address the issue themselves by replacing the sensor or fixing wiring problems, it is recommended to consult a professional mechanic for an accurate diagnosis and repair.

7. Are there any tips to prevent OBDII code P1051 from appearing on my 2005 Infiniti G35?

- To prevent the code P1051 from appearing, it is essential to perform regular maintenance on your vehicle, including checking the health of the sensors and electrical components.

8. Will clearing the OBDII code P1051 on my 2005 Infiniti G35 make the issue go away?

- Clearing the code may temporarily remove the warning light, but it will not fix the underlying issue causing the code to trigger. It is crucial to diagnose and repair the problem to prevent future occurrences.

9. How much does it typically cost to repair OBDII code P1051 on a 2005 Infiniti G35?

- The cost of repairing the code P1051 can vary depending on the root cause of the issue, but it may range from $200 to $500, including parts and labor.

10. Can OBDII code P1051 on a 2005 Infiniti G35 cause permanent damage if left untreated?

- Leaving the code P1051 untreated can potentially lead to permanent damage to the engine and emission control system, affecting the overall performance and efficiency of the vehicle.

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