AutoCodes – Nissan – P1147 2005 Nissan Altima Sedan

P1147 2005 Nissan Altima Sedan Code - Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank 1

Quick Answer

The Heated Oxygen Sensor 2 (HO2S) (Rear O2 Sensor), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Faulty heated oxygen (O2) sensor 2 (rear), Intake air leaks, Heated oxygen (O2) sensor 2 (rear) harness is open or shorted. 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: P1147 2005 Nissan Altima Sedan indicates Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank 1.
Common causes: Common causes include Faulty heated oxygen (O2) sensor 2 (rear), Intake air leaks, Heated oxygen (O2) sensor 2 (rear) harness is open or shorted.
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 4,879

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 May 02, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1147 2005 Nissan Altima Sedan Description

The Heated Oxygen Sensor 2 (HO2S) (Rear O2 Sensor), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air fuel mixture (air-fuel ratio) must be maintained near the ideal stoichiometric ratio. The HO2S output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Engine Control Module (ECM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S generates a voltage between 0.1 and 0.9 V in response to oxygen in the exhaust gas. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The ECM interprets Lean when the HO2S voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The ECM interprets Rich when the HO2S voltage is above 0.45 V.

OBDII Code P1147 2005 Nissan Altima Sedan - Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank 1 - AutoCodes.com — P1147 2005 Nissan Altima Sedan Code - Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank 1

What does this mean?

What are the Possible Causes of the DTC P1147 2005 Nissan Altima Sedan?

Faulty heated oxygen (O2) sensor 2 (rear)
Intake air leaks
Heated oxygen (O2) sensor 2 (rear) harness is open or shorted
Heated oxygen (O2) sensor 2 (rear) circuit poor electrical connection
Inappropriate fuel pressure
Faulty fuel injectors

How to Fix the DTC P1147 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

Replacing the O2 Sensor 2 usually takes care of the problem

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1147 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.

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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 P1147 2005 Nissan Altima Sedan Code

1. What does OBDII code P1147 on a 2005 Nissan Altima Sedan indicate?

- The code P1147 specifically refers to Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank 1 on a 2005 Nissan Altima Sedan.

2. What are the common symptoms of a P1147 code?

- Common symptoms include poor fuel economy, rough idling, engine misfires, and the illumination of the Check Engine Light.

3. What are the potential causes of a P1147 code?

- The code may be triggered by a faulty oxygen sensor, issues with the wiring or connectors, exhaust leaks, or a problem with the engine's air-fuel mixture.

4. How can I diagnose a P1147 code on my 2005 Nissan Altima Sedan?

- Diagnosing a P1147 code typically involves using an OBDII scanner to retrieve the code, inspecting the oxygen sensor and related components, and conducting voltage tests.

5. Can I still drive my vehicle with a P1147 code?

- It is generally not recommended to drive with a P1147 code as it can lead to further damage to the engine and emissions system.

6. How do I repair a P1147 code on a 2005 Nissan Altima Sedan?

- Repairing a P1147 code may involve replacing the oxygen sensor, repairing any damaged wiring, fixing exhaust leaks, or addressing any issues with the air-fuel mixture.

7. Are there any DIY tips for fixing a P1147 code?

- While some aspects of diagnosing and repairing a P1147 code can be done by DIY enthusiasts, it is recommended to seek professional help for a thorough and accurate fix.

8. How much does it typically cost to repair a P1147 code?

- The cost of repairing a P1147 code can vary depending on the specific underlying issue, but it may range from $100 to $500 or more, including parts and labor.

9. What happens if I ignore a P1147 code for an extended period?

- Ignoring a P1147 code can lead to decreased fuel efficiency, potential damage to the catalytic converter, and increased emissions, resulting in a failed emissions test.

10. How often should the oxygen sensor be replaced in a 2005 Nissan Altima Sedan to prevent a P1147 code?

- Oxygen sensors typically last around 60,000 to 90,000 miles, but it's a good idea to follow the manufacturer's recommendations and have them inspected regularly to prevent issues like a P1147 code.