Engine-Codes.com
Engine-Codes – Nissan – P1051 2005 Nissan Altima Sedan

P1051 2005 Nissan Altima Sedan Code - Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2

Quick Answer

The P1051 code on a 2005 Nissan Altima Sedan indicates a problem 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, Blown fuse related to the sensor. 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 Nissan Altima Sedan 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, Blown fuse related to the sensor.
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 14, 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 2005 Nissan Altima Sedan Description

The P1051 code on a 2005 Nissan Altima Sedan indicates a problem 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 (ECM) to ensure optimal fuel efficiency and emissions control. The heater control circuit is designed to heat up the sensor quickly to operating temperature for accurate readings.

OBDII Code P1051 2005 Nissan Altima Sedan - Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2
P1051 2005 Nissan Altima Sedan Code - Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2

Common Causes of P1051 2005 Nissan Altima Sedan

  1. Faulty Air Fuel Ratio Sensor 1
  2. Wiring issues in the heater control circuit
  3. Blown fuse related to the sensor
  4. ECM malfunction
  5. Poor electrical connection

Symptoms of P1051 2005 Nissan Altima Sedan

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Engine misfires
  4. Check Engine Light illuminated
  5. Increased emissions

How to Fix P1051 2005 Nissan Altima Sedan

  1. Diagnose the issue by using a scan tool to retrieve the fault code and inspect the Air Fuel Ratio Sensor 1 and its wiring.
  2. Test the sensor's heater control circuit for continuity and resistance to determine if it is functioning properly.
  3. Replace the Air Fuel Ratio Sensor 1 if it is found to be faulty.
  4. Check and replace any damaged wiring or connectors in the heater control circuit.
  5. Clear the fault code from the ECM memory and perform a test drive to ensure the issue has been resolved.

Cost to Fix P1051 2005 Nissan Altima Sedan

The typical repair costs for addressing a P1051 code on a 2005 Nissan Altima Sedan can range from $200 to $500, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships, while independent shops may offer lower rates. It's recommended to check with local shops for a more accurate estimate.

What does this mean?

Tech Notes for P1051 2005 Nissan Altima Sedan

There is a Factory Service Bulletin for the 2005 Nissan Altima:

2005 Nissan Altima Factory Service Bulletin OBDII Code P1051

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 Nissan Altima Sedan code?

Need more information on how to fix the P1051 2005 Nissan Altima Sedan code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1051 2005 Nissan Altima Sedan code diagnosed by a professional: Find a repair shop in your area

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 Nissan Altima Sedan Code

1. What does the OBDII code P1051 mean on a 2005 Nissan Altima?

P1051 indicates a problem in the Air Fuel Ratio Sensor 1 Heater Control Circuit on Bank 2, specifically that the circuit voltage is too low.

2. What are the symptoms of the P1051 code in a 2005 Nissan Altima?

Common symptoms include poor fuel efficiency, a rough idle, difficulty starting, reduced engine performance, and the check engine light being illuminated.

3. What causes the P1051 code to appear in a Nissan Altima?

Possible causes include a faulty air-fuel ratio sensor, damaged wiring or connectors in the sensor heater circuit, a blown fuse, or a malfunctioning engine control module (ECM).

4. How do I diagnose the P1051 code on my 2005 Nissan Altima?

Start by inspecting the air-fuel ratio sensor and its wiring for visible damage, check for blown fuses, and use a multimeter to test the sensor's heater circuit for proper resistance and voltage.

5. Can I drive my 2005 Nissan Altima with the P1051 code?

While the car may still be drivable, driving with this code can result in decreased fuel efficiency, increased emissions, and potential damage to other engine components if not addressed.

6. How do I fix the P1051 code on my Nissan Altima?

Repairs may include replacing the air-fuel ratio sensor, repairing or replacing damaged wiring or connectors, replacing a blown fuse, or, in rare cases, replacing the ECM.

7. How much does it cost to repair the P1051 code on a 2005 Nissan Altima?

The cost varies depending on the issue. Replacing the air-fuel ratio sensor typically costs between $150 and $400, including parts and labor.

8. Can a dirty air filter cause the P1051 code?

No, a dirty air filter is unlikely to cause this specific code, as it relates to the heater control circuit of the air-fuel ratio sensor rather than airflow.

9. Does the P1051 code affect emissions on a 2005 Nissan Altima?

Yes, a faulty air-fuel ratio sensor can affect the vehicle's ability to maintain the correct air-fuel mixture, leading to increased emissions.

10. How can I prevent the P1051 code from reappearing?

Regular maintenance, including checking the condition of sensors, wiring, and connectors, and promptly addressing any issues with the vehicle's electrical or fuel systems, can help prevent this code.

Discuss the causes and fixes for P1051 2005 Nissan Altima Sedan OBDII Code

Submit a New Comment

Code P1051 2005 Nissan Altima Sedan comments

No comments found for this page.