AutoCodes – 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 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. Common causes include 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. 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 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.
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.

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Code Popularity 4,720

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 05, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1051 2005 Nissan Altima Sedan Description

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

What does this mean?

What are the Possible Causes of the DTC P1051 2005 Nissan Altima Sedan?

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 DTC P1051 2005 Nissan Altima Sedan?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

There is a Factory Service Bulletin for the 2005 Nissan Altima:
2005 Nissan Altima Factory Service Bulletin OBDII Code P1051

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1051 2005 Nissan Altima Sedan code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1051 2005 Nissan Altima Sedan 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 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.