AutoCodes – Nissan – P1147 2005 Nissan Sentra

P1147 2005 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 2005 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 10,977

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 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 2005 Nissan Sentra - Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank - AutoCodes.com — P1147 2005 Nissan Sentra Code - Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank

What does this mean?

What are the Possible Causes of the DTC P1147 2005 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 2005 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 2005 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 2005 Nissan Sentra code?

Need more information on how to fix the P1147 2005 Nissan Sentra code? Get Access to Factory Service Manuals

Need Help with the 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 2005 Nissan Sentra Code

What are the common symptoms of OBDII code P1147 on a 2005 Nissan Sentra?

Common symptoms of OBDII code P1147 on a 2005 Nissan Sentra may include poor fuel economy, rough idling, hesitation when accelerating, and the illumination of the check engine light.

What does the OBDII code P1147 on a 2005 Nissan Sentra indicate?

The OBDII code P1147 on a 2005 Nissan Sentra indicates an issue with Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank 1.

What are the possible causes of OBDII code P1147 on a 2005 Nissan Sentra?

Possible causes of OBDII code P1147 on a 2005 Nissan Sentra include a faulty heated oxygen sensor, wiring issues, a vacuum leak, or a problem with the engine's air-fuel mixture.

How can I diagnose the OBDII code P1147 on a 2005 Nissan Sentra?

To diagnose OBDII code P1147 on a 2005 Nissan Sentra, you can use an OBDII scanner to read the code and then inspect the heated oxygen sensor, check for any wiring damage, and look for vacuum leaks.

How can I repair OBDII code P1147 on a 2005 Nissan Sentra?

To repair OBDII code P1147 on a 2005 Nissan Sentra, you may need to replace the heated oxygen sensor, repair any damaged wiring, fix any vacuum leaks, or address any issues with the air-fuel mixture.

Can I drive my 2005 Nissan Sentra with OBDII code P1147?

It is not recommended to drive your 2005 Nissan Sentra with OBDII code P1147, as it can lead to poor engine performance and potential damage if left unaddressed.

How urgent is it to fix OBDII code P1147 on a 2005 Nissan Sentra?

It is important to address OBDII code P1147 on a 2005 Nissan Sentra promptly to prevent further issues and ensure optimal engine performance and fuel efficiency.

Is it possible to clear OBDII code P1147 on a 2005 Nissan Sentra without fixing the underlying issue?

Clearing OBDII code P1147 on a 2005 Nissan Sentra without fixing the underlying issue will only temporarily remove the check engine light, but the problem will persist and may lead to more significant issues over time.