AutoCodes – Nissan – P1147 2003 Nissan Sentra

P1147 2003 Nissan Sentra Code - Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank

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 2003 Nissan Sentra indicates Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank.
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 9,097

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 2003 Nissan Sentra 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 2003 Nissan Sentra - Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank - AutoCodes.com — P1147 2003 Nissan Sentra Code - Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank

What does this mean?

What are the Possible Causes of the DTC P1147 2003 Nissan Sentra?

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 2003 Nissan Sentra?

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 rear O2 Sensor usually takes care of the problem

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1147 2003 Nissan Sentra 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 2003 Nissan Sentra 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 P1147 2003 Nissan Sentra Code

1. What are the common symptoms of OBDII code P1147 on a 2003 Nissan Sentra?

The common symptoms of code P1147 include poor fuel economy, rough idling, and potential engine stalling.

2. What does the OBDII code P1147 on a 2003 Nissan Sentra indicate?

Code P1147 indicates an issue with Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank 1.

3. What are the possible causes of OBDII code P1147 on a 2003 Nissan Sentra?

Possible causes of code P1147 include a faulty oxygen sensor, wiring issues, exhaust leaks, or a problem with the engine control module (ECM).

4. How can I diagnose the OBDII code P1147 on my 2003 Nissan Sentra?

Diagnosing code P1147 usually involves using an OBDII scanner to read the code, inspecting the wiring and connections of the oxygen sensor, and testing the sensor's functionality.

5. Can I drive my 2003 Nissan Sentra with OBDII code P1147?

It is not recommended to drive your vehicle with code P1147 unresolved, as it can lead to further damage and potential safety hazards.

6. How much does it typically cost to repair OBDII code P1147 on a 2003 Nissan Sentra?

The cost of repairing code P1147 can vary depending on the exact cause of the issue, but it may range from around $150 to $500, including parts and labor.

7. Can I repair OBDII code P1147 on my 2003 Nissan Sentra myself?

If you have the necessary tools and expertise, you may be able to repair code P1147 yourself by replacing the faulty oxygen sensor or addressing any wiring issues.

8. How urgent is it to address OBDII code P1147 on a 2003 Nissan Sentra?

While code P1147 may not cause immediate drivability issues, it is important to address it promptly to prevent potential damage to the catalytic converter and other components.

9. Will resetting the OBDII code P1147 on my 2003 Nissan Sentra make it go away permanently?

Resetting the code may temporarily clear the warning light, but if the underlying issue causing code P1147 is not resolved, the code is likely to reappear.

10. How can I prevent OBDII code P1147 from appearing on my 2003 Nissan Sentra in the future?

Regular maintenance, including inspecting and replacing oxygen sensors as needed, can help prevent code P1147 from recurring on your 2003 Nissan Sentra.