AutoCodes – Nissan – P1147 2002 Nissan Altima Sedan

P1147 2002 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 2002 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 4,317

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1147 2002 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 2002 Nissan Altima Sedan - Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank 1 - AutoCodes.com — P1147 2002 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 2002 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 2002 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 2002 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 P1147 2002 Nissan Altima Sedan code?

Need more information on how to fix the P1147 2002 Nissan Altima Sedan code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1147 2002 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 P1147 2002 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P1147 on a 2002 Nissan Altima Sedan?

The common symptoms of code P1147 include poor fuel economy, rough idling, stalling, and a possible decrease in engine performance.

2. What does the OBDII code P1147 indicate on a 2002 Nissan Altima Sedan?

Code P1147 indicates an issue with Heated Oxygen Sensor 2 Maximum Voltage Monitoring on Bank 1 in the exhaust system of the vehicle.

3. What are the possible causes of OBDII code P1147 on a 2002 Nissan Altima Sedan?

Possible causes of code P1147 can include a faulty oxygen sensor, wiring issues, exhaust leaks, or problems with the engine's air-fuel mixture.

4. How can I diagnose the OBDII code P1147 on my 2002 Nissan Altima Sedan?

Diagnosing code P1147 involves using an OBDII scanner to read the code, inspecting the oxygen sensor and its wiring, checking for exhaust leaks, and ensuring proper air-fuel mixture.

5. Can I drive my 2002 Nissan Altima Sedan with OBDII code P1147?

It is not recommended to drive your vehicle with code P1147 as it can lead to further damage and potentially affect the performance and efficiency of your Nissan Altima.

6. How do I repair OBDII code P1147 on my 2002 Nissan Altima Sedan?

Repairing code P1147 typically involves replacing the faulty Heated Oxygen Sensor 2 on Bank 1, fixing any wiring issues, addressing exhaust leaks, and ensuring the correct air-fuel mixture.

7. Will resetting the OBDII code P1147 on my 2002 Nissan Altima Sedan fix the issue?

Simply resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing code P1147 on your Nissan Altima Sedan.

8. How much does it cost to repair OBDII code P1147 on a 2002 Nissan Altima Sedan?

The cost of repairing code P1147 can vary depending on the cause of the issue, but it may involve a replacement oxygen sensor, wiring repairs, or exhaust system fixes.

9. Can a DIY enthusiast fix OBDII code P1147 on a 2002 Nissan Altima Sedan?

Depending on your skill level and access to tools, a DIY enthusiast may be able to replace the oxygen sensor or address wiring issues causing code P1147 on a Nissan Altima Sedan.

10. How often does OBDII code P1147 occur in a 2002 Nissan Altima Sedan?

Code P1147 can occur sporadically or persistently, depending on the root cause of the issue in the Heated Oxygen Sensor 2 on Bank 1 of a 2002 Nissan Altima Sedan.